Calculate internal temperature and energy changes

[Pochen Liu]

Homework Statement

Calculate internal temperature and energy changes

Relevant Equations

pV = nRT

Question

(These are incorrect values)

Attempt
I used

and then found the respective change in temperature.

However for the last question I have no idea, do I sum up the net change in temperature and use

But then what is the work and how do we figure it out?

 

[Chestermiller]

Your answers to question a and b are incorrect. Please show your work.

Regarding question c, True of False:

1. The change in internal energy between two thermodynamic equilibrium states of a pure substance is a function only of the temperature, pressure, and volume of the substance in those two states.

2. If the temperature, pressure, and volume of a substance in the two states is known, the process path between these two states (as characterized by Q and W) is irrelevant to determining the change in internal energy.

3. For a given amount of an ideal gas, its internal energy depends only on its temperature (and not pressure or volume).