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Explain how heat flow from colder region...

Explain how heat flow from colder region to a hotter region occur?

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CHETANA PUBLICATION-Thermodynamics-EXERCISE
  1. Explain how heat flow from colder region to a hotter region occur?

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  2. A gas initially at 17^@C issuddenly compressed to 1/8 of its original ...

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  3. A gas expands from 75 litres to 125 litres at constant pressure of 4 a...

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  4. When the temperature of 5 mol of a gas is changed from 100^@C to 120^@...

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  5. 5 mol of oxygen is heated at constant volume from 10^@C to 20^@C. Find...

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  6. An amount of heat of 100 cal is supplied to a gas. The work done by th...

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  7. 400 J of work is performed on a gasfor reducing its volume by compress...

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  8. A cylinder contains one gram mole of H2 at 17^@C and 2 atms. The initi...

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  9. In a thermodynamic process 400 J of heat is given to a gas and 100 J o...

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  10. If 5 moles of oxygen at STP is adiabatically compressed so that temper...

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  11. 70 calories of heat is required to raise the temperature 2 moles of an...

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  12. If 1200 calories of heat is removed from a gas which is held at consta...

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  13. The volume of 1 kilomole of an ideal gas increases isothermally from 1...

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  14. Work done for the rise of one mole of helium gas adiabatically through...

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  15. A diatomic gas at pressure P and volume V is compressed adiabatically ...

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  16. During an adiabatic process, if the pressure of an ideal gas is propor...

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  17. Calculate the efficiency of a Carnot's engine working between steam po...

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  18. A Carnot engine takes in 1000 k cal of heat from a reservoir at 627^@C...

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  19. A Carnot engine whose low temperature reservoir is at 7^@C has an effi...

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  20. A refrigerator has to transfer an average of 263 J of heat per second ...

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  21. Refrigerator A works between (-10)^@C and 27^@C while refrigerator B w...

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