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Unformatted text preview: 1. Which is not true for an endothermic reaction? a) The temperature of the surroundings decreases. b) The enthalpy change for the reaction is positive. c) Heat flows from the surroundings into the system. d) The products have a lower enthalpy than the reactants. e) All of the above are true. 2. A system that does no work but which transfers heat to the surroundings has a) q < 0, E > 0 b) q < 0, E < 0 c) q > 0, E > 0 d) q > 0, E < 0 3. Which of the following is not a state function? a) internal energy b) volume c) work d) pressure 4. How much heat, in kJ, is required to raise the temperature of 125 g H 2 O from 2.2C to 48.6C? The specific heat of water is 4.18 J g 1 C 1 . a) 523 kJ b) 24.2 kJ c) 1.15 kJ d) 1.35 kJ e) 48.4 kJ 5. If 25.0 g of water at 21C is mixed with 45.0 g of water at 75C, what is the final temperature of the mixture? a) 40C b) 48C c) 56C d) 63C e) 38C 6. When 10 g samples of the following materials absorb 100 J of heat, the temperature increase indicated is 6....
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