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17. How much heat is required to change the temperature of 50 g of ice cube...

17. How much heat is required to change the temperature of 50 g of ice cube initially at - 30 0C to steam at 160 0C? (Express your answer in J){ specific heat of ice is 2090 J/kg 0C, that of water is 4186 J/kg 0C, that of steam is 2010 J/kg 0C; Lf = 3.33 X 10 J/kg, Lv = 2.26 X 10 J/kg.}

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Answer #1

This phase change process will take place in 5 steps as shown in the figure. First ice will change into water and then water will change into steam. Please note that latent heat of fusion and vaporisation are 3.33*10^5 j/kg and 2.26*10^5 j/kg respectively. Please check for the typing error.

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