Enthalpy and Specific Heat Pre-Lab PDF

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enthalpy pre lab answers for anyone in chem 115....

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Enthalpy and Specific Heat PRE-LAB QUESTIONS 1. Water and steam are both 100ºC when water is boiling, but a burn from steam is worse than a burn from the water. Hypothesize why this is the case.

2. A 10-g ice cube, initially at 0ºC, is melted in 100 g of water that was initially 20ºC. After the ice has melted, the equilibrium temperature is 10.93 ºC. Calculate:

a. The total heat lost by the water (the specific heat for water is 4.186 J/g·°C).

b. The heat gained by the ice cube after it melts (the specific heat for ice is 2.093 J/g·°C).

c. The heat it took to melt the ice (Hint: It takes 334 J of heat energy to melt 1 g of ice).

3. Inside a calorimeter is 100 g of water at 39.8ºC. A 10-g object at 50ºC is placed inside the calorimeter. When equilibrium has been reached, the new temperature of the water and metal object is 40ºC. What type of metal is the object made from? Hint: Use Table 1 in the Introduction for reference.

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