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how much heat energy is required to convert 38.4 of liquid sulfur dioxide SO2 at 205.6 K to gaseous SO2 at 263.1 K ?
The molar heat of vaporization of SO2 is 24.9 kJ/mol and the specific heat capacity (C) of liquid SO2 is 1.36 J/(gxC)
1 Answer
- Roger the MoleLv 71 year ago
You also need to know the boiling point of SO2. The source below says 263 K.
So supposing that is close enough to 263.1 K that the heat capacity of gaseous SO2 can be neglected.
Supposing the missing units on "38.4" to be "grams".
(1.36 J/(g·°C)) x (38.4 g) x (263.1 - 205.6)°C = 3002.88 J to heat the liquid to its boiling point
(24.9 kJ/mol) x (38.4 g / (64.0638 g SO2/mol)) = 14.925 kJ to vaporize the liquid
3.00288 kJ + 14.925 kJ = 17.9 kJ total
