A necessary condition for an adiabatic change is-

1. ∆T = 0

2. ∆P = 0

3. q = 0

4. w = 0

The enthalpy of formation of all elements in their standard state is-

1. Unity

2. Zero

3. Less than zero

4. Different for each element

The amount of heat needed to raise the temperature of 60.0 g of aluminum from 35°C to 55°C would be -

(Molar heat capacity of Al is $24 \mathrm{J} {\mathrm{mol}}^{-1} {\mathrm{K}}^{-1}$)

$$\begin{gathered} 1. 1.07 \mathrm{J} \\ 2. 1.07 \mathrm{kJ} \\ 3. 106.7 \mathrm{kJ} \\ 4. 100.7 \mathrm{kJ} \end{gathered}$$