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Thermal Physics> 20 g of ice in 10 g copper calorimeter is...

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20 g of ice in 10 g copper calorimeter is originally at -30 degree C. how much steam at 100 degree C must be condensed in the calorimeter if the ice is to be changed to water and heated to 40 degree C

Sayandip Chatterjee , 7 Years ago

Grade 11

1 Answers

Eshan

Last Activity: 7 Years ago

Total water equivalent mass of the system is $20g+10g=30g$

Hence the amount of heat needed to reach its temperature to $40^{\circ}C$ $=(30)(0.5)(0-(-30))+(30)(80)+(30)(1)(40-0)$
Hence this should be equal to the amount of heat given out by condensing $m$ mass of stem.
$\implies m(540)=(30)(0.5)(0-(-30))+(30)(80)+(30)(1)(40-0)$
$\implies m=7.5g$

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