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-1Cp=29.9JK-1mol-1 (20 marks)
State the first law of thermodynamics.
07
Aug