think you can answer my hard chemistry question?

Question

PCl5 (g) ---> PCl3 + Cl2

for the reaction above, delta H = +22.1 kilocalories per mole at 25 degrees celcius.

a. does the tendency of reactions to proceed to a state of minimum energy favor the formation of the products of this reaction? explain

b. does the tendency of reactions to proceed to a state of maximum entropy favor the formation of the products of the reaction? Explain

c. state whether an increase in temperature drives this reaction to the left, to the right, or has no effect.
Explain

d. State whether a decrease in volume of the system at constant temperature drives this reaction to the right, to the left, or has no effect. Explain

Answer 1

a) the reaction is endothermic. it requires energy to form the products. hence it is unfavourable.

b) reactants is one mole of gas. products got two moles of gas. one mole becomes two moles, there is more disorder, hence higher entropy. It is favourable

c) Increase in temp drives it to the right t products. it usese energy to form products (endothermic). adding more heat hence makes it shift to the right according to le chateliers principle.

d) Once again, one mole of reactant becomes two moles of product (gas). Daltons law of parial pressure states that two moles of gas will have more pressure than one mole of gas, requiring more volume. hence by decreasing volume, pressure is increased and the reaction drives to the left to reactants coz it occupy less space.

Answer 2

The fact that this reaction is endothermic means that it is tending to maximum, not minimum energy. But the fact that 2 moles of gas are being produced from one is increasing the entropy. If it's endothermic, supplying extra heat will drive the reaction in the endothermic direction, ie forwards, and decreasing the volume will make the system try to decrease the pressure - by going to the left.

Answer 3

a. No. You are putting energy into this reaction to make it go.

b. Yes. One particle yields two. The entropy increases.

c. An increase in temperature drives the resaction to the right for the reason in a. The reaction is endothermic.

d. An increase in volume drives thge reaction to the right in an effort to restore pressure according to le Chatelier's principle.