Butane (C4H10) has a heat of vaporization of 22.44 kJ/mol and a normal boiling point of -0.4 °C. A 250-mL sealed flask contains 0.55 g of butane at -22 °C. How much butane is present as a liquid? If the butane is warmed to 25 °C, how much is present as a liquid?

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Q: into

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