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Chemistry

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Era Boyer

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Cards in this guide (13)
What is an endothermic reaction

An endothermic reaction is one that absorbs heat from the surroundings.

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 does the difference in potential energy between the reactants and products represent

It represents the change in enthalpy for the reaction.

What does a positive H look like on a potential energy diagram

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

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 much energy is consumed by thawing 4.3 g ice

4.3 g * 1 mol/18.02 g * 6.03 kJ/mol

What is the name of the field of study with laws that describe how energy is transferred to different locations and forms

Thermodynamics

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

What does the enthaply of reaction measure

The enthalpy of reaction is the change of the system enthalpy after a chemical reaction.

How is Hess's law used to measure enthalpy of desired reaction

Intermediate equations with known enthalpies are added together

What is heat included in the equation of an endothermic reaction

The heat in an endothermic reaction is included as a reactant on the left side of the equation, and has a positive value.

which of the following is an example of an Arrhenius acid

HI

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