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What is the heat change in J associated with 74 g of gaseous butane at 91 oC changing to solid at -170 oC? c(butane) (gas) = 2.31 J/ (g.K) c(butane) (liq) = 1.65 J/(g.K) c(butane) (s) = 1.32 J/ (g.K) ?Hfus(butane) = 6.885 kJ/mol ?Hvap(butane) = 21.0 kJ/mol The freezing point of butane is -138 oC. The boiling point of butane is 0 oC.

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