You are interested in determining the heat of isomerization of two isomers (A and B), so...

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Chemistry

You are interested in determining the heat of isomerization oftwo isomers (A and B), so you measure their heats of combustion.The difference between the heats of combustion is equal to the heatof isomerization. You are given two separate samples of (1.5 Â± 0.1)mol for each isomer, A and B, and they are burned in aconstant-pressure calorimeter.
The heat of capacity of the calorimeter is (8.44 Â± 0.05) kJ K-1.Combustion of isomer A causes the temperature to rise by (2.0 Â±0.1) K, and isomer B causes the temperature to rise by (3.5 Â± 0.1)K.
(a) Calculate the molar heat of isomerization (Î”Hi = Î”HB -Î”HA)
(b) Calculate the uncertainty in the molar heat ofisomerization. Assume that the errors in the moles of isomers A andB, heat capacity of the calorimeter, and temperature readings aresmall and independent.

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4.4 Ratings (746 Votes)

a molar heat of isomerization Hi HB HAwith actual measurementsignoring uncertainty in valuesHA844 Kj k1 20 k15 mol1125 KJ molHB844 Kj k1 35 k15 mol1969 KJmolHi19691125844 KJmolb See Answer

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