## Thermodynamics B/C

WhatScience?
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### Re: Thermodynamics B/C

raxu wrote:I only know two scenarios: when the molecules are relatively large (e.g. octane) and when there is strong intermolecular interactions (e.g. water vapor).

The equation is $\left(P+\frac{n^2a}{V^2}\right)(V-nb)=nRT$. The correction factor $a$ accounts for intermolecular interactions, and the correction factor $b$ accounts for size of gases.

The bob temperature scale is a linear temperature scale where at 1 atm, water freezes at 42°B and boils at 239°B. Convert -53 °C to °B.
Hey, I am pretty much quoting you to give you a notification that it is your turn to give a question.

shrewdPanther46
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### Re: Thermodynamics B/C

Il jump in here (even tho im not doing the event...)

What factor of a reaction must be negative for it to be spontaneous?

WhatScience?
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### Re: Thermodynamics B/C

shrewdPanther46 wrote:Il jump in here (even tho im not doing the event...)

What factor of a reaction must be negative for it to be spontaneous?
In the equation for Gibbs free Energy Delta G should end up negative for the reaction to be spontaneous.

raxu
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### Re: Thermodynamics B/C

WhatScience? wrote:
raxu wrote:I only know two scenarios: when the molecules are relatively large (e.g. octane) and when there is strong intermolecular interactions (e.g. water vapor).

The equation is $\left(P+\frac{n^2a}{V^2}\right)(V-nb)=nRT$. The correction factor $a$ accounts for intermolecular interactions, and the correction factor $b$ accounts for size of gases.

The bob temperature scale is a linear temperature scale where at 1 atm, water freezes at 42°B and boils at 239°B. Convert -53 °C to °B.
Hey, I am pretty much quoting you to give you a notification that it is your turn to give a question.
There is a question in there
Richard
Events done Div. B: Simple Machines , Shock Value.
Events done Div. C: Astronomy , It's About Time, Forensics, Optics, Remote Sensing, Game On, Materials Science, Mousetrap Vehicle, Fermi Questions, Thermodynamics.

WhatScience?
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### Re: Thermodynamics B/C

raxu wrote:
WhatScience? wrote:
raxu wrote:I only know two scenarios: when the molecules are relatively large (e.g. octane) and when there is strong intermolecular interactions (e.g. water vapor).

The equation is $\left(P+\frac{n^2a}{V^2}\right)(V-nb)=nRT$. The correction factor $a$ accounts for intermolecular interactions, and the correction factor $b$ accounts for size of gases.

The bob temperature scale is a linear temperature scale where at 1 atm, water freezes at 42°B and boils at 239°B. Convert -53 °C to °B.
Hey, I am pretty much quoting you to give you a notification that it is your turn to give a question.
There is a question in there
So here are my calculation...there are 1.97 degrees Celsius for every 1 degree Bob.

42-(53*1.97)=-62.41

So my guess is -62.41 degrees B. Is this correct? I highly doubt it as I have never seen a problem like this.

WhatScience?
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### Re: Thermodynamics B/C

WhatScience? wrote:
raxu wrote:
WhatScience? wrote:
Hey, I am pretty much quoting you to give you a notification that it is your turn to give a question.
There is a question in there
So here are my calculation...there are 1.97 degrees Celsius for every 1 degree Bob.

42-(53*1.97)=-62.41

So my guess is -62.41 degrees B. Is this correct? I highly doubt it as I have never seen a problem like this.
I further believe this calculation because I created an equation for Celsius as x related to Bob as y and this is what came up. Very interesting question. Made me think.

WhatScience?
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### Re: Thermodynamics B/C

raxu wrote:
WhatScience? wrote:
raxu wrote:I only know two scenarios: when the molecules are relatively large (e.g. octane) and when there is strong intermolecular interactions (e.g. water vapor).

The equation is $\left(P+\frac{n^2a}{V^2}\right)(V-nb)=nRT$. The correction factor $a$ accounts for intermolecular interactions, and the correction factor $b$ accounts for size of gases.

The bob temperature scale is a linear temperature scale where at 1 atm, water freezes at 42°B and boils at 239°B. Convert -53 °C to °B.
Hey, I am pretty much quoting you to give you a notification that it is your turn to give a question.
There is a question in there
Can I go???

Am I right???

raxu
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### Re: Thermodynamics B/C

Yes! Go for it!
Richard
Events done Div. B: Simple Machines , Shock Value.
Events done Div. C: Astronomy , It's About Time, Forensics, Optics, Remote Sensing, Game On, Materials Science, Mousetrap Vehicle, Fermi Questions, Thermodynamics.

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### Re: Thermodynamics B/C

raxu wrote:Yes! Go for it!
Convection is a form of heat transfer among fluids. What is the basic property that allows it to work?

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### Re: Thermodynamics B/C

[hide]
Convection is heat transfer by the mass movement of molecules from one place to another (Giancoli). Convection occurs because hot fluids rise. This is because when a fluid is heated, in most cases, its volume increases. Thus, its density decreases, and it experiences a buoyant force propelling it upwards. [/hide]

Next question: During photosynthesis, cells combine "disorderly" compounds (CO2 and H2O) into "orderly" glucose molecules. Is this a violation of the second law of thermodynamics?

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