Four things happened to SO2 when it was converted from solid to gas as shown below:
When calculating heat, we will use two equations:
1. Use the following equation for the steps where SO2 is in the same phase and increasing temperature:
2. Use the following equation for phase changes:
Calculate amount of heat required convert SO2(s) to SO2(l):
Sulfur dioxide is produced in enormous amounts for sulfuric acid production. It melts at −73°C and boils at −10.°C. Its ΔH°fus is 8.619 kJ/mol, and its ΔH°vap is 25.73 kJ/mol. The specific heat capacities of the liquid and gas are 0.995 J/g•K and 0.622 J/g•K, respectively. How much heat is required to convert 2.500 kg of solid SO2 at the melting point to a gas at 60.°C?
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Our tutors have indicated that to solve this problem you will need to apply the Heating and Cooling Curves concept. You can view video lessons to learn Heating and Cooling Curves. Or if you need more Heating and Cooling Curves practice, you can also practice Heating and Cooling Curves practice problems.
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Our data indicates that this problem or a close variation was asked in Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition. You can also practice Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition practice problems.