[chris22]

The combustion of propane in a constant-pressure calorimeter results in a measured increase in the
temperature of the calorimeter:

CH3CH2CH3(g) + 5O2(g) → 3CO2(g) + 4H2O(l)

Which of the following statements applies to the chemical reaction under these conditions?

I. The chemical reaction cannot be treated as an isothermal process since heat is released.

II. The heat is equal to the change in the internal energy of the system.

III. The enthalpy change is less than the internal energy change since work is positive.

IV. The entropy of the system decreases if the gases are assumed to be ideal.

V. The total entropy of the universe must remain constant since the calorimeter is adiabatic. 

Why did you pick the above answer(s)