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Solution: An unknown liquid has a vapor pressure of 88 mmHg at 45 ◦C a...

Question

An unknown liquid has a vapor pressure of 88 mmHg at 45 C and 39 mmHg at 25C. What is its heat of vaporization?

1. 32 kJ/mol 

2. 2000 J/mol

3. 32000 kJ/mol

4. 2000 kJ/mol