(Solved): Physical constants The constants for H2O are shown here: - Specific heat of ice: sice=2.09 ...

Physical constants The constants for ${\mathrm{H}}_2\mathrm{O}$ are shown here: - Specific heat of ice: $s_{\text{ice }}=2.09\mathrm{J}/\left(\mathrm{g}\cdot {}^{\circ }\mathrm{C}\right)$ - Specific heat of liquid water: $s_{\text{water }}=4.18\mathrm{J}/\left(\mathrm{g}\cdot {}^{\circ }\mathrm{C}\right)$ - Enthalpy of fusion $\left({\mathrm{H}}_2\mathrm{O}(\mathrm{s})\to {\mathrm{H}}_2\mathrm{O}(\mathrm{l})\right):\Delta H_{\text{fus }}=334\mathrm{J}/\mathrm{g}$ - Enthalpy of vaporization $\left({\mathrm{H}}_2\mathrm{O}(\mathrm{l})\to {\mathrm{H}}_2\mathrm{O}(\mathrm{g})\right):\Delta H_{\text{vap }}=2250\mathrm{J}/\mathrm{g}$ Part A How much heat energy, in kilojoules, is required to convert $73.0\mathrm{g}$ 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.