i. State the first law of thermodynamics.(2 marks)
ii. Explain what heat is and work in thermodynamics.(2marks)
iii. Explain what internal energy for a system is.(2 marks)
iv. Explain the meaning of a thermodynamic system(2marks)
v. What is a state function ?Give an example(2 marks)
B) Calculate the work done when 2 moles of H2 expands.
i. Isothermally against a constant pressure of atm at 250C from 15 liters to 50 liters.(5 marks)
ii. The gas expands isothermally and reversibly.(5 marks)
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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