ThermochemistryHard

Question

2MnO4 – + 16H+ + 10Cl– → 2Mn2+ + 5Cl2(g) + 8H2O

The above reaction is endothermic and hence, the actual temperature of the reaction vessel (isolated from the surrounding) may be different from that expected. Given that the initial temperature of the reaction vessel was used in the calculations, how would this affect the predicted value of moles of Cl2 (n) according to the equation n = PV/RT?

Options

A.It would be greater than the actual value
B.It would be less than the actual value
C.It would be the same as the actual value
D.This cannot be determined from the information given

Solution

As the process is endothermic but no heat is absorbed from surrounding, the temperature of the system will decrease, As initial temperature is used, the calculated mole will be lower.

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