Answer the following questions involving specific heat capacities : a ) How much energy is required to...

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Physics

Answer the following questions involving specific heatcapacities :
a ) How much energy is required to change 42 g ice cube from iceat -11Â°C to steam at 111Â°C?
b ) Liquid nitrogen, which has a boiling point of 77 K, iscommonly used to cool substances to low temperatures. How muchenergy must be removed from 1.0 kg of gaseous nitrogen at 77 K forit to completely liquefy?
c ) How much energy is needed to melt 0.225 kg of lead so thatit can be used to make a lead sinker for fishing? The sample has aninitial temperature of 27.3Â°C and is poured in the mold immediatelyafter it has melted.

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4.4 Ratings (742 Votes)

Part aGIven is mass of the ice cube m42 g or 0042 KgInitial temperature 11 C Final temperature 111 CSpecefic heat for water for different phases is c for ice 2108 kJkgKc for water See Answer

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