A volatile liquid has a vapor pressure of 135 mmHg at 45°C. At what temperature will it have a vapor pressure of 235 mmHg? The substance has a heat of vaporization of 5.4 x 103 J/mol and the thermodynamic gas constant, R, is 8.31 J/mol-K.

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.

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