Engineering Thermodynamics — Winter 2021

Explain Ist law of thermodynamics. Prove that internal energy is a property.

Define thermodynamic system. Classify it with proper examples.

Write Kelvin-Planck’s and Clausius’ statements for IInd law of thermodynamics. Prove that violation of Kelvin-Plank statement leads to violation of Clausius statement.

Derive steady flow energy equation. Reduce it for nozzle clearly stating assumptions.

An M.S. steel piece of 5 kg mass is heated to 115° Cand dropped into an insulated vessel containing 30 kg of water at 20° C. due to heat transfer between hot M.S. piece and water, temperature of water rises by 3.5° C. Calculate specific heat of M.S. piece. Take specific heat of water = 4.18 kJ/kg C.

A 3 kg Aluminum block at 200° C & 1 kg of copper block at 100° Care brought into contact but kept isolated from surrounding. Find change in entropy for both blocks and total entropy change when both attain same temperature. Take Cp for Al = 0.9 kJ/kg Kand Cp for Copper = 0.4 kJ/kg K.

Prove that all reversible engines working between two constant temperature reservoirs have the same efficiency.

State the principle of increase of entropy. List the four application of entropy principle.

An engine manufacturer claims to have developed a heat engine with following conditions; Power developed = 75 kW, Fuel burnt = 5 kg/hour, heating value of fuel = 73000 kj/kg, Temperature limits = 1000 Kand 400 K. Is the claim is true or false? Give reason for your answer.

Explain Rankine cycle with necessary diagrams.

Derive equation for exergy of finite heat capacity source at temperature ‘T’. Also differentiate between available and unavailable energy.

Compare Otto, Diesel and Dual cycle for

Same compression ration and heat supplied with necessary diagrams.

Explain ideal regenerative cycle. Explain why it is impractical in practice?

Derive Maxwell’s equations.1

State and explain the Gibbs-Dalton law of partial pressures.

With neat sketch, explain the working of Junker’s gas calorimeter.

Derive Vander Waal’s equation.