Is the Solution Manual's Approach to Internal Energy Calculation Accurate?

[r12214001]

Homework Statement

My calculation:
|210 X 101.3 – 45| = |-15 X (P)X 101.3 + 45|

Relevant Equations

N/A

Question:

Solution manual:

Is the solution manual correct or not? why does not contain heat transfer?

 

[Chestermiller]

The solution manual is correct. It does not contain heat transfer because it is a trick question. They wanted to test your understanding by providing more information than was necessary to solve the problem. Apparently, you fell for the trick. What puzzles me is how in the world you arrived at your solution.

 

[r12214001]

The solution manual is correct. It does not contain heat transfer because it is a trick question. They wanted to test your understanding by providing more information than was necessary to solve the problem. Apparently, you fell for the trick. What puzzles me is how in the world you arrived at your solution.

why does not contain heat transfer? please educate me.

 

[Chestermiller]

why does not contain heat transfer? please educate me.

Because work is $P\Delta V$. What has this got to do with the heat transfer?Anyway, if you had gotten the signs correct in your equation, you would have gotten the right answer. What's with those absolute value signs?

 

[r12214001]

Because work is $P\Delta V$. What has this got to do with the heat transfer?Anyway, if you had gotten the signs correct in your equation, you would have gotten the right answer. What's with those absolute value signs?

TKS for reply
why the energy of work cannot converted to the energy of heat?

 

[Chestermiller]

TKS for reply
why the energy of work cannot converted to the energy of heat?

What does TKS mean? Who says work can’t be converted to heat?

 

[mjc123]

The solution manual is wrong in implying that 1 L atm = 1 J (although its final answer is correct).