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April 27, 2015

Homework Help: chemistry

Posted by Trish on Monday, April 19, 2010 at 7:38pm.

Calculate the energy that must be removed to convert substance X from a gas at 115C to a solid -50.7C. Assume X has a molar mass of 75.0 g/mol.

Specific heat capacities
ΔHvap 20. kJ/mol C(s) 3.0 J/g C
ΔHfus 5.0 kJ/mol C(l) 2.5 J/g C
bp 75C C(g) 1.0 J/g C
mp −15C

If you can go step by step so I can understand how this is done That would be great! Thanks

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