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Chemistry

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Freda McKenzie

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2y ago
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Cards in this guide (14)
An increase in temperature will cause the rate of a chemical reaction to

increased temperture causes rate or reaction to increase.

What defines an exothermic reaction

A reaction that produces heat

What does the enthalpy of reaction measure

The amount of energy that is used or released as heat in a reaction.

Which of the following best describes a neutralization reaction

Answer this question… Which of the following best describes a neutralization reaction? A. Acid + base H+ + OH- B. Acid + base salt + water C. Acid + base metal + nonmetal D. Acid + base H2O + H3O+

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 describes the entropy change of a gas reaction

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

How does entropy change in gas reactions

Reactions that increase the moles of gas will increase in entropy.

What does a negative change in entropy indicate

The system has become more ordered.

Which of the following would most likely be spontaneous

A reaction that produces heat

Which of the following would have the best thermal conductor properties

A cup made of metal. (Apex)

A concentration unit expressed in units of moles of solute per kilogram of solvent

This is called molality.

What chemical reaction describes where energy is absorbed

You think probable to an endothermic chemical reaction.

How is the H fusion used to calculate the mass of solid that 1kJ of energy will melt

1kj x 1/H fusion x g/mol solid

If 6 moles of a compound produce 84 J of energy what is the delta H reaction in jmol

84 J/6 moles = 14 J/mole = ∆H

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