Question

1. A chemical reaction which releases heat to the surroundings is called a) exothermic b) endothermic c) mesothermic d) geothermic 2. When there is a change in internal energy (?U), either work will be done or :a) the volume will decrease b) the pressure will increase c) the temperature will change d) new substances will be formed 3. If a gas is being compressed by a constant external pressure, the sign of the work being done will be: a) positive d) negative c) zero d) depends on the nature of the gas 4. Enthalpy (?H) is defined as: a) heat at constant temperature b) heat at constant pressure c) heat at constant volume d) work at constant pressure 5. If the temperature of 1.0 gram of an unknown metal increases from 25°C to 45°C when 20 joules of heat are added, the specific heat of this metal is: a) 0.5 J/g°C b) 2.0 J/g°C c) 1.00 J/g°C d) 1.75 J/g°C

          1. A chemical reaction which releases heat to the surroundings is called a) exothermic b) endothermic c) mesothermic d) geothermic
2. When there is a change in internal energy (?U), either work will be done or :a) the volume will decrease b) the pressure will increase c) the temperature will change d) new substances will be formed
3. If a gas is being compressed by a constant external pressure, the sign of the work being done will be: a) positive d) negative c) zero d) depends on the nature of the gas
4. Enthalpy (?H) is defined as: a) heat at constant temperature b) heat at constant pressure c) heat at constant volume d) work at constant pressure
5. If the temperature of 1.0 gram of an unknown metal increases from 25°C to 45°C when 20 joules of heat are added, the specific heat of this metal is: a) 0.5 J/g°C b) 2.0 J/g°C c) 1.00 J/g°C d) 1.75 J/g°C

1. A chemical reaction which releases heat to the surroundings is called a) exothermic b) endothermic c) mesothermic d) geothermic
2. When there is a change in internal energy (?U), either work will be done or :a) the volume will decrease b) the pressure will increase c) the temperature will change d) new substances will be formed
3. If a gas is being compressed by a constant external pressure, the sign of the work being done will be: a) positive d) negative c) zero d) depends on the nature of the gas
4. Enthalpy (?H) is defined as: a) heat at constant temperature b) heat at constant pressure c) heat at constant volume d) work at constant pressure
5. If the temperature of 1.0 gram of an unknown metal increases from 25°C to 45°C when 20 joules of heat are added, the specific heat of this metal is: a) 0.5 J/g°C b) 2.0 J/g°C c) 1.00 J/g°C d) 1.75 J/g°C

Added by Brenda S.

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