Question 3.8: In a sauna, 122 g of water is converted to steam at 100 °C. ...
In a sauna, 122 g of water is converted to steam at 100 °C. How many kilojoules of heat are needed?
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STEP 1 State the given and needed quantities.
ANALYZE THE PROBLEM | Given | Need | Connect |
122 g of water at 1oo °C | kilojoules to convert to steam at 100 °C | heat of vaporization, 2260 J/g |
STEP 2 Write a plan to convert the given quantity to the needed quantity.
grams of water Heat ofvaporization→joules Metricfactor→kilojoules
STEP 3 Write the heat conversion factor and any metric factor.
1 g of H2O(l→g)=2260 J1 g of H2O2260 J and 2260 J 1 g of H2O1 kJ = l000 J 1 kJ l000 J and l000 J 1 kJSTEP 4 Set up the problem and calculate the needed quantity.
Heat=Three SFs122 g H2O× Exact1 g H2O 2260 JThreeSFs×Exact1000 J1 KJExact=Three SFs276 KJRelated Answered Questions
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