(Solved): 21) What is a bomb calorimeter used for? A) to measure \( \Delta \mathrm{H} \) of a reaction. which ...

21) What is a bomb calorimeter used for? A) to measure \( \Delta \mathrm{H} \) of a reaction. which is heat released or absorbed at constant volume. B) to measure \( \Delta H \) of a reaction. which is heat released or absorbed at constant pressure. C) to measure \( \triangle E \) of a reaction, which is heat released or absorbed at constant volune. D) to measure \( \Delta \mathrm{E} \) of a reaction. which is heat released or absorbed at constant pressure. E) pressure changes during a reaction 22) What is Hess's Law? A) The \( \Delta H \) of a reaction depends on the physical states of the reactants and products. B) If a reaction is carried out in a series of steps, the \( \Delta H \) for the reaction will equal the product of the enthalpy changes for the individual steps. C) \( \Delta \mathrm{H} \) of a reaction is \( \mathrm{H}_{\text {product }}-\mathrm{H}_{\text {seartaet }} \). D) If a reaction is carried out in a series of steps, the \( \Delta H \) for the reaction will equal the sum of the enthalpy changes for the individual steps. E) \( \Delta H \) depends on how many steps are involved in the reaction. 23) \( \Delta H \) for dissolution of \( \mathrm{KOH} \) in water is \( -57500 \mathrm{~J} / \mathrm{mol} \). A chemist dissolved a \( 4.5 \mathrm{~g} \) sample of \( \mathrm{KOH} \) in \( 100.0 \) grams of water at \( 23^{\circ} \mathrm{C} \) in a coffee cup calorimeter. What is the final temperature of the solution? Assume the specific heat of the solution is \( 4.184 \mathrm{~J} / \mathrm{g} \cdot{ }^{\circ} \mathrm{C} \). A) \( 9.5^{\circ} \mathrm{C} \) B) \( 14.2^{\circ} \mathrm{C} \) C) \( 25.8^{\circ} \mathrm{C} \) D) \( 33.5^{\circ} \mathrm{C} \) E) \( 39.1^{\circ} \mathrm{C} \)