Thermodynamics B/C

Test your knowledge of various Science Olympiad events.
User avatar
WhatScience?
Member
Member
Posts: 394
Joined: July 16th, 2017, 4:03 pm
Division: C
State: NJ

Thermodynamics B/C

Postby WhatScience? » September 5th, 2017, 5:45 am

I do not know what happened to this but 2018!!! Thermo!!!!
"When you clean your room, you are increasing the total chaos of the universe" - Hank Green Crash Course (Entropy)

Events 2018

Thermodynamics, Potions and Poisons, Disease Detectives, Optics, and Towers

User avatar
WhatScience?
Member
Member
Posts: 394
Joined: July 16th, 2017, 4:03 pm
Division: C
State: NJ

Re: Thermodynamics B/C

Postby WhatScience? » September 5th, 2017, 5:56 am

A person wants to replace the window on their house, but they don't want their heating and cooling bills to change. The original window on the wall of the house has area A, thickness d, and is made out of glass that has a thermal conduction constant k. Which one of the following changes could be made to the window that would leave the rate of thermal conduction the same as the original window?

A: double the area, cut the thickness in half, cut the k constant in half

B: cut the area in half, cut the thickness in half, and double the k constant

C: quadruple the area, double the thickness, cut the k constant in half

D: double the area, double the thickness, quadruple the k constant
"When you clean your room, you are increasing the total chaos of the universe" - Hank Green Crash Course (Entropy)

Events 2018

Thermodynamics, Potions and Poisons, Disease Detectives, Optics, and Towers

User avatar
EastStroudsburg13
Administrator
Administrator
Posts: 3007
Joined: January 17th, 2009, 7:32 am
Division: Grad
State: MD
Location: At work trying to be a real adult
Contact:

Re: Thermodynamics B/C

Postby EastStroudsburg13 » September 5th, 2017, 5:58 am

WhatScience? wrote:I do not know what happened to this but 2018!!! Thermo!!!!

When site rollover occurs from the 2017 to 2018 seasons, the old event threads get archived so that new threads can be created. This is done so that discussions about new rules and updates can happen in their own threads, as opposed to continuations of threads from the previous year.
East Stroudsburg South Class of 2012, Alumnus of JT Lambert, Drexel University Class of 2017

Helpful Links
Wiki
Wiki Pages that Need Work
FAQ and SciOly FAQ Wiki
Chat (See IRC Wiki for more info)
BBCode Wiki


If you have any questions for me, always feel free to shoot me a PM.

User avatar
WhatScience?
Member
Member
Posts: 394
Joined: July 16th, 2017, 4:03 pm
Division: C
State: NJ

Re: Thermodynamics B/C

Postby WhatScience? » September 5th, 2017, 6:03 am

EastStroudsburg13 wrote:
WhatScience? wrote:I do not know what happened to this but 2018!!! Thermo!!!!

When site rollover occurs from the 2017 to 2018 seasons, the old event threads get archived so that new threads can be created. This is done so that discussions about new rules and updates can happen in their own threads, as opposed to continuations of threads from the previous year.


Oh, thx.
"When you clean your room, you are increasing the total chaos of the universe" - Hank Green Crash Course (Entropy)

Events 2018

Thermodynamics, Potions and Poisons, Disease Detectives, Optics, and Towers

User avatar
WhatScience?
Member
Member
Posts: 394
Joined: July 16th, 2017, 4:03 pm
Division: C
State: NJ

Re: Thermodynamics B/C

Postby WhatScience? » September 6th, 2017, 5:46 pm

WhatScience? wrote:A person wants to replace the window on their house, but they don't want their heating and cooling bills to change. The original window on the wall of the house has area A, thickness d, and is made out of glass that has a thermal conduction constant k. Which one of the following changes could be made to the window that would leave the rate of thermal conduction the same as the original window?

A: double the area, cut the thickness in half, cut the k constant in half

B: cut the area in half, cut the thickness in half, and double the k constant

C: quadruple the area, double the thickness, cut the k constant in half

D: double the area, double the thickness, quadruple the k constant


ummm Guys
"When you clean your room, you are increasing the total chaos of the universe" - Hank Green Crash Course (Entropy)

Events 2018

Thermodynamics, Potions and Poisons, Disease Detectives, Optics, and Towers

wzhang5460
Member
Member
Posts: 87
Joined: April 29th, 2017, 3:53 pm
Division: B
State: NY

Re: Thermodynamics B/C

Postby wzhang5460 » September 7th, 2017, 6:19 pm

D
Credits to Khan Academy lol.

Who was the scientist who came up with the basic ideas of the Second Law of Thermodynamics?
PJ Gelinas Jr High Captain
National Medals
Wind Power 2017: 5th
National Honorable Mentions
Mystery Arch. 2018: 7th
Exp. Design 2017, 2018: 10th
Towers 2018: 10th

Circuit Lab NY State Champion

User avatar
WhatScience?
Member
Member
Posts: 394
Joined: July 16th, 2017, 4:03 pm
Division: C
State: NJ

Re: Thermodynamics B/C

Postby WhatScience? » September 8th, 2017, 1:48 pm

Rudolf Julius Emanuel Clausis

A steel part that has the temperature of 700 degrees C is put into an oil bath to cool down. The bath must operate in between 25 and 30 degrees C. You want to use the smallest amount of oil possible to cool down the part. If the oil bath is starts at 25 C, what is the minimum amount of oil required of quench a steel part that is 175 grams?

specific heat of oil = 0.5 calories/gram C

specific heat of steel = 0.107 calories/gram C
"When you clean your room, you are increasing the total chaos of the universe" - Hank Green Crash Course (Entropy)

Events 2018

Thermodynamics, Potions and Poisons, Disease Detectives, Optics, and Towers

User avatar
Alex-RCHS
Member
Member
Posts: 530
Joined: November 4th, 2016, 3:46 pm
Division: C
State: NC
Location: Raleigh, NC

Re: Thermodynamics B/C

Postby Alex-RCHS » September 8th, 2017, 6:36 pm

WhatScience? wrote:Rudolf Julius Emanuel Clausis

A steel part that has the temperature of 700 degrees C is put into an oil bath to cool down. The bath must operate in between 25 and 30 degrees C. You want to use the smallest amount of oil possible to cool down the part. If the oil bath is starts at 25 C, what is the minimum amount of oil required of quench a steel part that is 175 grams?

specific heat of oil = 0.5 calories/gram C

specific heat of steel = 0.107 calories/gram C

Answer
5018.3g

Next question: Explain the 0th law of thermodynamics.
I have the ACT tomorrow why am I doing this lol
About me!
Raleigh Charter HS (NC) 2018
UNC-Chapel Hill 2022

User avatar
WhatScience?
Member
Member
Posts: 394
Joined: July 16th, 2017, 4:03 pm
Division: C
State: NJ

Re: Thermodynamics B/C

Postby WhatScience? » September 9th, 2017, 6:44 am

If thermodynamic system a is in equilibrium with thermodynamic system c, and thermodynamic system c is in equilibrium with thermodynamic system b, thermodynamic systems a and b are also in equilibrium.
"When you clean your room, you are increasing the total chaos of the universe" - Hank Green Crash Course (Entropy)

Events 2018

Thermodynamics, Potions and Poisons, Disease Detectives, Optics, and Towers

User avatar
WhatScience?
Member
Member
Posts: 394
Joined: July 16th, 2017, 4:03 pm
Division: C
State: NJ

Re: Thermodynamics B/C

Postby WhatScience? » September 9th, 2017, 6:45 am

Explain the difference in between entropy driven and enthalpy driven reactions.
"When you clean your room, you are increasing the total chaos of the universe" - Hank Green Crash Course (Entropy)

Events 2018

Thermodynamics, Potions and Poisons, Disease Detectives, Optics, and Towers

Raleway
Exalted Member
Exalted Member
Posts: 228
Joined: March 12th, 2017, 7:19 pm
Division: C
State: -

Re: Thermodynamics B/C

Postby Raleway » September 9th, 2017, 8:55 am

WhatScience? wrote:Explain the difference in between entropy driven and enthalpy driven reactions.


When using Gibb's Free Energy Equation (dG = dH - TdS) or any derivative form of that with Enthalpy and Entropy in it, that the larger of the two expressions (entropy or enthalpy) that make the reaction spontaneous will be said to have "driven" the reaction.

Question: When reading a phase change diagram. describe the kinetic energy at the triple point relative to the other three states' kinetic energy.
Sleep is for the week; one only needs it once a week :!: :geek: :roll: :?: :idea:

God bless Len Joeris | Balsaman

User avatar
WhatScience?
Member
Member
Posts: 394
Joined: July 16th, 2017, 4:03 pm
Division: C
State: NJ

Re: Thermodynamics B/C

Postby WhatScience? » September 9th, 2017, 10:32 am

Raleway wrote:Question: When reading a phase change diagram. describe the kinetic energy at the triple point relative to the other three states' kinetic energy.


This is what I have in relation to a phase change diagram of water. Statements would be different for something like the diagram of carbon dioxide...

The triple point is at the highest average kinetic energy possible for a solid.

A gas' average kinetic energy will be higher than the triple point when the amount of pressure is above the triple point, but lower than the triple point when the pressure is lower than the triple point.

Since at most pressure levels, liquid has a freezing point and a boiling point, the average kinetic energy of a liquid can at any given pressure be both higher or lower than the average kinetic energy at the triple point.
"When you clean your room, you are increasing the total chaos of the universe" - Hank Green Crash Course (Entropy)

Events 2018

Thermodynamics, Potions and Poisons, Disease Detectives, Optics, and Towers

User avatar
WhatScience?
Member
Member
Posts: 394
Joined: July 16th, 2017, 4:03 pm
Division: C
State: NJ

Re: Thermodynamics B/C

Postby WhatScience? » September 9th, 2017, 10:46 am

Question: van der waals equation is a correction of the ideal gas law. In which three scenarios is it most applicable and what is the reasoning behind the changes made to the equation?
"When you clean your room, you are increasing the total chaos of the universe" - Hank Green Crash Course (Entropy)

Events 2018

Thermodynamics, Potions and Poisons, Disease Detectives, Optics, and Towers

Kavar
Member
Member
Posts: 1
Joined: January 21st, 2017, 12:11 pm
Division: C
State: NC

Re: Thermodynamics B/C

Postby Kavar » September 10th, 2017, 10:01 am

wzhang5460 wrote:D
Credits to Khan Academy lol.

I believe you are mistaken. The answer should be C if you cancel out the values correctly. Credits to Khan Academy ;) :D .

User avatar
WhatScience?
Member
Member
Posts: 394
Joined: July 16th, 2017, 4:03 pm
Division: C
State: NJ

Re: Thermodynamics B/C

Postby WhatScience? » September 10th, 2017, 12:22 pm

WhatScience? wrote:Question: van der waals equation is a correction of the ideal gas law. In which three scenarios is it most applicable and what is the reasoning behind the changes made to the equation?
"When you clean your room, you are increasing the total chaos of the universe" - Hank Green Crash Course (Entropy)

Events 2018

Thermodynamics, Potions and Poisons, Disease Detectives, Optics, and Towers


Return to “2018 Question Marathons”

Who is online

Users browsing this forum: No registered users and 4 guests