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1. After substance A was added to a beaker of water, the water temperature decreased. Which statement explains this phenomenon?
this process was exothermic and required hear from water substance was endothermic and required heat from water substance A caused the water to boil the water molecules moved faster none of the above

2. 500mL of solution A at 23.0C is mixed with 500mL of solution B in a bomb calorimeter. The final solution has a density of 2.0g/mL, final temperature of 26.3C, and a specific heat capacity of 5.12 J/C*g. What is the enthalpy change per mole of the final solution?
3.3 x 104 J 3.37 x 104 J 1.7 x 104 J 1.68 x 104 J 2.4 x 104 J

3. The pathway is independent of:
work change in energy heat volume none of the above

4. Potential energy depends on:
time position composition B&A B&C

5. The pathway is dependent of:
heat work change in energy A & B B & D

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