(Solved): Physical constants The constants for \( \mathrm{H}_{2} \mathrm{O} \) are shown here: - Specitic he ...

Physical constants The constants for \( \mathrm{H}_{2} \mathrm{O} \) are shown here: - Specitic heat of ice: \( s_{\text {ime }}=2.09 \mathrm{~J} /\left(\mathrm{g} \cdot{ }^{\circ} \mathrm{C}\right) \) - Specific heat of liquid water: \( s_{\text {water }}=4.18 \mathrm{~J} /\left(\mathrm{g} \cdot{ }^{\circ} \mathrm{C}\right) \) - Enthalpy of fusion \( \left(\mathrm{H}_{2} \mathrm{O}(\mathrm{s}) \rightarrow \mathrm{H}_{2} \mathrm{O}(1)\right) ; \Delta H_{\text {fus }}=334 \mathrm{~J} / \mathrm{g} \) - Enthalpy of vaporization \( \left(\mathrm{H}_{2} \mathrm{O}(\mathrm{l}) \rightarrow \mathrm{H}_{2} \mathrm{O}(\mathrm{g})\right): \Delta H_{\text {vap }}=2250 \mathrm{~J} / \mathrm{g} \) Part A How much heat energy, in kilojoules, is required to convert \( 75.0 \mathrm{~g} \) of ice at \( -18.0{ }^{\circ} \mathrm{C} \) to water at \( 25.0^{\circ} \mathrm{C} \) ? Express your answer to three significant figures and include the appropriate units. X Incorrect; Try Again; 5 attempts remaining Part B How long would it take for \( 1.50 \mathrm{~mol} \) of water at \( 100.0{ }^{\circ} \mathrm{C} \) to be converted completely into steam if heat were added at a constant rate of \( 24.0 \mathrm{~J} / \mathrm{s} \) ? Express your answer to three significant figures and include the appropriate units.