A bowl of 464 g of water is placed in a microwave oven that, Ask an Expert

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1. A bowl of 464 g of water is placed in a microwave oven that puts out 776 watts (J/s). How long would it take in seconds to increase the temperature of the water from 12.0oC to 46.0oC? Use SF.

2. 247.0 g of water is in a Styrofoam calorimeter of negligible heat capacity. The initial T of the water is 16.7oC. After 347.6 g of an unknown compound at 88.9oC is added, the equilibrium T is 25.9oC. What is the specific heat of the unknown compound in J/(goC)?

3. A process takes place at constant pressure. The volume changes and the temperature increases by 65.3oC. The heat capacity of the system at constant volume, CV, is 471.3 kJ/oC. What is %u0394E in kJ? (Careful--pay attention to the units of the heat capacity.)

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Category:- Chemistry
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