Calculate Hfor each of the following processes. In each case, restate your result as a
Chapter 8, Problem 8.7(choose chapter or problem)
Calculate Hfor each of the following processes. In each case, restate your result as a specific enthalpy relative to a reference state. [The solutionwhich you should verifyand the restatement for Part (a) are given as an illustration.] Assume that the process pressures are low enough for H^ to be considered independent of pressure, so that the formulas of Table B.2 (which strictly apply at 1 atm) can be used. (a) CH3COCH3(l, 15C) CH3COCH3(l, 55C). Solution: H^ 5:180 kJ/mol The specific enthalpy of liquid acetone at 55C relative to liquid acetone at 15C is 5.180 kJ/mol. (b) n-C6H14l; 25C ! n-C6H14l; 80C (c) n-C6H14(v, 500C) n-C6H14(v, 0C). (Make statements about both the specific enthalpy of hexane vapor at 500C relative to hexane vapor at 0C and the specific enthalpy of hexane vapor at 0C relative to hexane vapor at 500C.)
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