Answer the following questions and explain briefly (in no more than three senten

Question

Answer the following questions and explain briefly (in no more than three sentences): a. Does the addition of an inert diluent to the reactants entering an exothermic process increase, decrease, or make no change in the heat transfer to or from the process? b. If the reaction in a process is incomplete, what is the effect on the value of the standard heat of reaction? Does it go up, go down, or remain the same? c. Consider the reaction H2 (g) + 12 O2 (g) H2O (g). Is the heat of reaction with the reactants entering and the products leaving at 500 K higher, lower, or the same as the standard heat of reaction?

Explanation / Answer

1) The effect of adding inert diluent will depend upon the moles of reactant or product moles

At constant volume there will be no change.

At constant pressure, the number of moles of diluent added will increase volume and hence will decrease the concentration so the equilibrium will shift in the direction where moles are more and accordingl the heat transfer will take place.

2) If reaction is incomplete, the heat of reaction will be less (go down).

The heat of reaction is the amount of heat releases or absorbed when one mole of reactant reacted with each other. So the heat of reaction will be less if less amount of reactants are being consumed (reaction is incomplete as given).

3) H2 (g) + 12 O2 (g) H2O (g)

The reaction is endothermic and the heat of reaction will be consumed to carry on the reaction. If the products is continuously being removed from the vessel then more heat will be required for formation of product.

However the heat of reation / Mole will remain the same.

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