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A referigertor has COP of 3 . How much w...

A referigertor has COP of `3` . How much work must be supplied to a refrigertor in order to remove `200J` of heart from its interior?

Text Solution

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`COP=beta=(Q_(L))/(W)`
`W=(Q_(L))/(COP)=(200)/(3)=66.67J`
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FULL MARKS-HEAT AND THERMODYNAMICS-ADDITIONAL QUESTIONS SOLVED (Numerical Problems)
  1. A referigertor has COP of 3 . How much work must be supplied to a refr...

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  2. The length of a metal wire is l(1) when the tension in it is T(1) and ...

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  3. A Steel rod of length 25 cm has a cross - sectional area of 0.8cm^(2)....

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  4. The temperature at the bottom of a 40 m deap lake is 12^(@)C and that ...

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  5. A jar 'A' is filled with an ideal gas characterised by parameters P, V...

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  6. By what percentage should the pressure of a given mass of a gas be inc...

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  7. A flask is filled with 13 g of an ideal gas at 27^(@)C and its tempera...

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  8. A rod of metal - 1 of length 50.0 cm elongates by 0.10 cm when it is h...

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  9. A balloon is filled at 27^(@)C and 1 atm pressure by 500m^(3) He. Then...

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  10. During an experiment an ideal gas is found to obey an additional law V...

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  11. Two vessels separately contain two ideal gases A and B at the same tem...

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  12. For a gas the difference between the two specific heates is 4150 J/Kg ...

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  13. A mass of ideal gas at pressure P is expanded isothermally to four tim...

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  14. A carnot engine operating between temperature T(1) andT(2) has efficie...

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  15. A perfect gas goes from state A to state B by absorbing 8xx10^(5)J of ...

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  16. A Carnot engine having an efficiency of eta = (1 / 10) as a heat engin...

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  17. An ideal gas compressed to half its initial volume by means of several...

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