Define equilibrium and state Phase rule
[3 marks]Explain (i) System and Surroundings (ii) Macroscopic and Microscopic aspect
[4 marks]Derive the first law of thermodynamics for close system
[7 marks]Show that C - C = Rfor an ideal gas P V
[3 marks]Write a note on various statements of the second law of thermodynamics
[4 marks]Asteel casting weighing 35 kg at a temperature 725K is quenched in 150 kg oil at 275K. If there are no heat losses, Calculate the change in entropy. The specific heat (C ) of steel is 0.88 kJ/kg Kand that of oil is 2.5 kJ/kg P K.
[7 marks]For an ideal gas with constant heat capacities, undergoing a reversible adiabatic (and therefore isentropic) process, prove that: 1 T T2 = P P2 − 107
[ marks]Explain Hess law of heat summation
[3 marks]Asystem consisting of a gas confined in a cylinder undergoes following series of processes before it is brought back to initial conditions. Step1: Aconstant pressure process when it receives 500J of work and gives up 200J of heat. Step2: Aconstant volume process when it receives 100J of heat. Step3: An adiabatic process. Determine the change in internal energy ΔU during each step and work done during adiabatic process.
[4 marks]Calculate the compressibility factor and molar volume of methanol vapour at 500K and 10bar. Using virial equation truncated up-to the third virial coefficient? B = -2.19 ×10-4 m3/mol, C -1.73 ×10-8 m6/mol2.
[7 marks]Write a note on Third law of thermodynamics
[3 marks]Explain the operation of heat pump.
[4 marks]For the following reaction, CO + 4H 2H O + CH The standard heat of reaction at 298 Kis -164.987 kJ. The constants in the heat capacity (J/mol K) are as below; α β× 103 γ× 106 CO 26.75 42.26 -14.252 H 26.88 4.35 -0.332 H O 29.16 14.49 -2.022 CH 13.41 77.03 -18.744 Calculate the standard heat of reaction at 773K. Use C = α + βT + γT2 p
Aheat engine operates between a heat source at 700 Kand a heat sink at 300 K. What is the maximum efficiency of the engine?
[3 marks]Enlist various liquefaction processes and explain any one process used in the process industry
[4 marks]Show that in a 2-stage reciprocating compressor, the min. total work results when the pressure ratios in each stage are equal and are given by the square root of the over-all pressure ratio
[7 marks]Write Short note on “Ejectors”.
[3 marks]What is an equation of state? Give the expression for any three equations of state
[4 marks]Explain with a schematic diagram the working of an absorption refrigeration system
[7 marks]Discuss about Pitzer’s modification to law of corresponding states?
[3 marks]List the properties affecting the choice of a refrigerant?
[4 marks]Explain the operation of heat pump.
[7 marks]Draw and explain the mnemonic diagram for the thermodynamics property relations.
[3 marks]List all Maxwell relations
[4 marks]Show that in multistage compression for minimum work, the inter-stage pressure is the geometric mean of the initial and final pressures
[7 marks]