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1. What is the molar heat of solidification for water? H(solid) f or H2O = ____________________ (look above and just make negative) 2. What is

1. What is the molar heat of solidification for water? H(solid) f or H2O = ____________________ (look above and just make negative)

2. What is the molar heat of condensation for water? H(con) f or H2O = ____________________ (look above and just make negative) 3. Is melting endothermic or exothermic? Explain.

4. How much energy is released to the environment by 50.0 grams of condensing water vapor?Is this Endothermic or Exothermic? 5. Calculate the amount of heat needed to melt 35.0 g of ice at 0 oC. Express your answer in joules.

, 6. How much energy is absorbed by 300g of methanol, CH3O H, as it evaporates? The molar heat of vaporization is 35.3kJ/mol.Is this Endothermic or Exothermic? Endo

7. If 540g of water condenses on a car during a cool night, calculate the amount of energy released to the air during this condensation.Is this Endothermic or Exothermic?

8. Calculate the mass of methanol, CH3O H, needed to release 650 KJ of energy as the methanol condenses. The molar heat of vaporization is 35.3kJ/mol.Is this Endothermic or Exothermic?

9. What mass of aluminum metal would absorb 250.0 kJ when it melted at its melting point? The molar enthalpy of fusion for aluminum is +10.71kJ/mol. (your answer will be in moles, convert to grams)

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