Using Heat of Vaporization In a sauna, 122 g of water is converted to steam at 100 °C. How many kilojoules of heat are needed?
Step 1 List the grams of substance and change of state.
Given 122 g of \mathrm{H}_{2}\mathrm{O}(l)\mathrm{\,to\,H}_{2}\mathrm{O}(g)
Need kilojoules of heat to change state
Step 2 Write the plan to convert grams to heat and desired unit.
Step 3 Write the heat conversion factor and metric factor if needed.
Step 4 Set up the problem with factors.
112 \cancel{g H_{2}O}\times \frac{2260 \cancel{J}}{1 \cancel{g H_{2}O}}\times \frac{1 kJ}{1000 \cancel{J}}=276 kJ