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1. Since H(p,T), the total differential is

Identify one of these two partials as a quantity that would be tabulated for a particular compound.

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Extra: What is its value for an ideal polyatomic gas?

2. What is the difference between adiabatic and isothermal?

adiabatic: no heat transferred with surroundings, q = 0 -> D U = q_ad

isothermal: system is kept at constant temperature throughout process, D T = 0

{for an ideal gas D U = 0}