Problem 1
Assume you have two samples of two different metals, \(\mathrm{X}\) and \(\mathrm{Z}\). The samples are exactly the same mass. Both samples are heated to the same temperature. Then each sample is placed into separate glasses containing identical quantities of cold water, initially at identical temperatures below that of the metals. The final temperature of the water containing metal \(\mathrm{X}\) is greater than the final temperature of the water containing metal \(\mathrm{Z}\). Which of the two metals has the larger heat capacity? Explain your conclusion. If each sample, initially at the same temperature, is heated with exactly \(100 \mathrm{~J}\) of energy, which sample has the higher final temperature?
Problem 2
Explain how Hess' Law is a consequence of conservation of energy.
Problem 5
Suggest a reason why \(\Delta\left(H^{\circ}\right)\) for the reaction $$ \mathrm{CO}_{2}(g) \rightarrow \mathrm{CO}(g)+\mathrm{O}(\mathrm{g}) $$ is not equal to \(\Delta\left(H^{\circ}\right)\) for the reaction $$ C O(g) \rightarrow C(g)+O(g) $$
Problem 6
Determine whether the reaction is exothermic or endothermic for each of the following circumstances: The heat of combustion of the products is greater than the heat of combustion of the reactants. The enthalpy of formation of the products is greater than the enthalpy of formation of the reactants. The total of the bond energies of the products is greater than the total of the bond energies for the reactants.
