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11th Standard English Medium Chemistry Subject Thermodynamics Creative 5 Mark Questions with Solution Part - I Question Bank Software Jun-25 , 2021

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11th Standard English Medium Chemistry Subject Thermodynamics Creative 5 Mark Questions with Solution Part - I

11th Standard English Medium Chemistry Subject Thermodynamics Creative 5 Mark Questions with Solution Part - I

11th Standard

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Chemistry

Time : 00:30:00 Hrs
Total Marks : 25
    5 x 5 = 25

  1. If an automobile engine burns petrol at a temperature of 816° C and if the surrounding temperature is 21° C, calculate its maximum possible efficiency

  2. Calculate the entropy change in the engine that receives 957.5 kJ of heat reversibly at 110°C temperature.

  3. Calculate the standard entropy change for the following reaction (Δsf0), given the standard entropies of CO2(g) ,  C(s) 'O2(g) as 213.6, 5.740, and 205 JK-1 respectively.

  4. Calculate the entropy change during the melting of one mole of ice into water at 0°C and 1 atm pressure. Enthalpy of fusion of ice is 6008 J mol-1.

  5. The entropy change in the conversion of water to ice at 272 k for the system is -22.88 Jk-1mol-1 and that of surrounding is + 24.85 Jk-1 mol-1, State whether the process is spontaneous or not?

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