A steel bottle contains 20 liters of hydrogen at 270c and a pressure of 50 atm. The gas expands isothermally and reversibly to 100 liters. Calculate: 1) How much heat had to be supplied? (4 marks) 2)The pressure of the hydrogen after expansion. (4 marks) 3)How much work was performed by the gas during expansion .(4 marks)

1. A)Explain with an example each of the following :
a) An adiabatic process .(2 marks)
b) An isochoric process.(2 marks)
c) Isothermal process.(2 marks)
d) Systems and surroundings.( 2 marks)
e) Closed system and isolated system.( 2 marks)
B)One mole of a diatomic gas at 300k and 5 atm expands to 1 atm. Assuming ideal behavior, calculate w, q, ?E and ?H if the expansion carried out was adiabatic and reversible.
Given CV=20.9JK-1mol-1
Cp=29.9JK-1mol-1 (20 marks

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