2. 500mL of solution A at 23.0°C is mixed with 500mL of solution B in a bomb calorimeter. The final solution has a density of 2.0g/mL, final temperature of 26.3°C, 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. 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
4. Which statement concerning Hess's Law is FALSE?
the change in enthalpy is the same regardless of the number of steps DH is also reversed">if reaction is reversed, the sign of DH is also reversed DH is directly proportional to the quantities of reactants and products in a reaction">the magnitude of DH is directly proportional to the quantities of reactants and products in a reaction DH indicates the direction of heat flow">the sign of DH indicates the direction of heat flow all statements are true
5. When a wheel rolls on a surface, the energy transferred by the tires to the surface is called:
fictional heating potential energy kinetic energy carpet burn pathway
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