II. When 50.0 g of aluminum at 20.0oC is placed in 50.0 mL of water at 30.0oC, the H2O will undergo a smaller temperature change than the aluminum. (The density of H2O = 1.0 g/mL, specific heat capacity of H2O = 4.18 J/oC•g, specific heat capacity of aluminum = 0.89 J/oC•g)

III. When a gas is compressed, the work is negative since the surroundings is doing work on the system and energy flows out of the system.

IV. For the reaction (at constant pressure) 2N2(g) + 5O2(g) --> 2N2O5(g), the change in enthalpy is the same whether the reaction takes place in one step or in a series of steps.

I, II, IV

II, III

II, III, IV

*d)II, IV

e)All of the above statements are true.