ThermoChemistry doubt

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A heat pump is used to draw water from a well.The temperature of the water is 15Â°C and that of the atmosphere is 40Â°C.If the amount of water drawn is 10kg through a depth of 12m, calculate the amount of heat supplied to the well.

#Chemistry #Physical Chemistry

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6 Answers

rocky ·2010-01-19 21:32:09

is it 550cal(approx.)

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Philip Calvert ·2010-01-21 10:06:06

anyone ?

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eureka123 ·2010-01-21 19:35:28

Work done=change in potetial enegy of water=10*10*12=1200 J

now coeff of performance of pump=\eta =\frac {Q_2}{W}=\frac {T_f}{T_f-T_i}=313/25=12.5

Now,
Heat \ supplied \ = \eta .W=(12.5)(1200)=15000J=15 KJ

maybe i used g=10..thats why ans is not exact

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eureka123 ·2010-02-05 05:15:56

well for expalination...u should turn to Page 308 NCERT phy (XI) part 2

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Philip Calvert ·2010-01-19 23:50:20

ans given is 14.72kJ

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Philip Calvert ·2010-02-05 04:46:05

can you explain your 2nd step a bit more

\eta =\frac {Q_2}{W}=\frac {T_f}{T_f-T_i}% ??

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ThermoChemistry doubt

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