An ideal gas has a gas constant R = 0.3 kJ/kg·K and a constant-volume specific heat cv = 0.7 kJ/kg·K. If the gas has a temperature change of 100°C, choose the correct answer for each of the following:
1. The change in enthalpy is, in kJ/kg
(a) 30
(b) 70
(c) 100
(d) Insufficient information to determine
2. The change in internal energy is, in kJ/kg
(a) 30
(b) 70
(c) 100
(d) insufficient information to determine
3. The work done is, in kJ/kg
(a) 30
(b) 70
(c) 100
(d) insufficient information to determine
4. The heat transfer is, in kJ/kg
(a) 30
(b) 70
(c) 100
(d) insufficient information to determine
5. The change in the pressure-volume product is, in kJ/kg
(a) 30
(b) 70
(c) 100
(d) insufficient information to determine