A closed vessel contains 5 kg of air, and 50 kJ of heat is given to it. If 75 kJ of work is done by the system, then which of the following is true?
(Take Cp = 1.005 kJ/kg-K, Cv = 0.718 kJ/kg-K)
1
The temperature of the air will increase by 7°
2
The temperature of the air will decrease by 7°
3
The temperature of the air will increase by 5°
4
The temperature of the air will decrease by 34.8°