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Chemistry

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Miller McLaughlin

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Cards in this guide (11)
What kind of changes contribute to spontaneity

An increase in entropy.

How does temperature affect the spontaneity of a reaction

if H and S have the same sign the temperature will determine spontaneity

What is true of the enthalpy value of an intermediate reaction

It is multiplied by 2 if the intermediate reaction is multiplied by 2

Which of the following is a statement of Hess's law

The enthalpy of reaction does not depend on the steps taken in the reaction.(Apex)

Which of the following describes the entropy change of a gas reaction

If there is an increase in the number of gas molecules, then S > 0.

What statement describes the potential energy diagram of an exothermic reaction

The potential energy of the reactants is greater than the potential energy of the products.

Which statements describes a difference between the mechanics of airplane flight and rocket flight

rockets need only upward thrust as a force for flight

What would happen to the entropy in the reaction 203g 302g

It increases

What describe the entropy change as a solution is made from a liquid and solid

In this case the entropy increase.

Describe energy in an exothermic reaction

An exothermic reaction gives out energy (the reactants heat up) as the reaction proceeds.

The size of a rocket's cargo determines the amount of thrust the engine must create to carry the rocket into outer space. What is another term for this cargo

Payload (apex)

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