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Chem200HWChap5

# Chem200HWChap5 - Chapter 5 1 a Near room temperature the...

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Chapter 5 1. a) Near room temperature, the specific heat capacity of ethanol is 2.42 J/ ° C.g. Calculate the heat needed to reduce the temperature of 150.0 g of C 2 H 5 OH from 50.0 ° C to 16.6 ° C. b) What mass of copper can be heated from 10 ° C to 200 ° C when 400 kJ of energy is available? The specific heat capacity of copper is 0.38 J/ ° C.g. 2. a) How much energy must be removed to lower the temperature of a 25.0 g block of ice (of specific heat capacity 2.03 J/ ° C.g ) from 12 ° C to –28 ° C? b) If the same energy were removed from 25.0 g of steam (of specific capacity 2.01 J/ ° C.g), what would be the temperature change? 3. A piece of metal of mass 20.0 g at 100 ° C is placed in a calorimeter containing 50.7 g of water at 22.0 ° C. The final temperature of the mixture is 25.7 ° C. What is the specific heat capacity of the metal? Assume that all the energy lost by the metal is gained by the water. 4. The reaction between aluminum and iron(III) oxide, produces a tremendous amount of heat.

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