Suppose 1.00 mol ice at –30°C is heated at atmospheric pressure until it is converted to steam at 140°C. Calculate q, w, AH, and AU for this process. For ice, water, and steam, cp is 38, 75, and 36 J K-1 mol¬1, respectively, and can be taken to be approximately independent of tempera- ture. AHfus for ice is 6.007 kJ mol=1, and AHvap for water is 40.66 kJ mol-1. Use the ideal gas law for steam, and assume that the volume of 1 mol ice or water is negligible relative to that of 1 mol steam.

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Suppose 1.00 mol ice at –30°C is heated at atmospheric
pressure until it is converted to steam at 140°C. Calculate
q, w, AH, and AU for this process. For ice, water, and
steam, cp is 38, 75, and 36 J K-1 mol¬1, respectively, and
can be taken to be approximately independent of tempera-
ture. AHfus for ice is 6.007 kJ mol=1, and AHvap for water
is 40.66 kJ mol-1. Use the ideal gas law for steam, and
assume that the volume of 1 mol ice or water is negligible
relative to that of 1 mol steam.
Transcribed Image Text:Suppose 1.00 mol ice at –30°C is heated at atmospheric pressure until it is converted to steam at 140°C. Calculate q, w, AH, and AU for this process. For ice, water, and steam, cp is 38, 75, and 36 J K-1 mol¬1, respectively, and can be taken to be approximately independent of tempera- ture. AHfus for ice is 6.007 kJ mol=1, and AHvap for water is 40.66 kJ mol-1. Use the ideal gas law for steam, and assume that the volume of 1 mol ice or water is negligible relative to that of 1 mol steam.
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