A sample of 1 mol of gas initially at 1 atm and 298 K is heated isotheramlly at

Question

A sample of 1 mol of gas initially at 1 atm and 298 K is heated isotheramlly at constant pressure to 350 K, then the gas is compressed isotheramlly to its initial volume and finally it is cooled to 298 K at constant volume. Which of the following values is zero?

1) delta S (surroundings) and delta G

2) delta S( system) and delta S surroundings

3) q and w

4) W

5) Delta G and Delta S (system)

I reasoned that the answer is the 1st, 2nd, and fifth due to the fact that entropy and gibbs free energy are state functions and that the final result is the same as the initial. Is this correct reasoning? Would really appreciate some help. Thanks in advance.

Explanation / Answer

Yes, your reasoning is right. As you mentioned, Entropy and Gibbs free energy are state functions so they would become zero in the given process that go around and comes to initial position i.e at 298K and 1atm at constant volume.

ANS : 1 , 2 and 5

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