Thermodynamics and gas cycles Qs

Question 1

State the quantity in the first law of thermodynamics that is zero when the change is adiabatic

Answer 1

Q (heat transfer)

Question 2

State the quantity in the first law of thermodynamics that is zero when the change is isothermal

Answer 2

(Delta)U (change/ increase/ decrease in internal energy)

Question 3

From the pV graph of a carnot cycle, explain how you could show that a change that takes place is isothermal, using information from the graph

Answer 3

• Check whether pV is constant/ pV should be constant

- Use data/ coordinates from at least 3 points on the graph (explicit)