(Answered) Heat of fusion for water

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1) Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 °C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 10.2 g of biphenyl in 32.6 g of benzene?

2) After an afternoon party, a small cooler full of ice is dumped onto the hot ground and melts. If the cooler contained 6.90 kg of ice and the temperature of the ground was 41.0°C, calculate the energy that is required to melt all the ice at 0°C. The heat of fusion for water is 80.0 cal/g. Please explain your answer and also provide examples

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