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Suppose the sample had 1-mol% impurity with a heat of combustion 10% larger than

ID: 951605 • Letter: S

Question

Suppose the sample had 1-mol% impurity with a heat of combustion 10% larger than that of the compound being studied, for example, napththalene or sucrose. Assuming that the measured heat of combustion of the mixture is a mole-fraction-weighted average of the components, what would be the effect of this impurity on the determined heat of formation of the particular compound. Suppose the sample had 1-mol% impurity with a heat of combustion 10% larger than that of the compound being studied, for example, napththalene or sucrose. Assuming that the measured heat of combustion of the mixture is a mole-fraction-weighted average of the components, what would be the effect of this impurity on the determined heat of formation of the particular compound.

Explanation / Answer

determined heat of formation will be greater than the actual one

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