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11 February, 07:24

A bomb calorimeter has a heat capacity of 2.47 kj/k. when a 0.120-g sample of ethylene (c2h4) was burned in this calorimeter, the temperature increased by 2.44 k. calculate the enthalpy change per mole of ethylene combusted.

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  1. 11 February, 07:52
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    Multiply heat capacity by the temperature change to come up with the enthalpy change. Then set up a conversion factor

    -2.47 kJ / K x 2.44 K = - 6.027 kJ

    (-6.027 kJ/0.120 g) x (28.052 g / 1 mol) = - 1408.9 = - 1.41 x 10^3 kJ
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