Energy of Reactions Test Review

Front

What is the heat of reaction in a potential energy diagram?

Back

The heat of reaction is the difference in energy between the reactants and products, represented by a specific line in the potential energy diagram.

Front

How do you determine the heat of reaction for the reverse reaction?

Back

The heat of reaction for the reverse reaction is equal in magnitude but opposite in sign to the heat of reaction for the forward reaction.

Front

What is the formula to calculate specific heat?

Back

Specific heat (c) = Heat absorbed (q) / (mass (m) × change in temperature (ΔT))

Front

What does activation energy represent in a reaction?

Back

Activation energy is the minimum energy required for a reaction to occur, represented by the height of the energy barrier in a potential energy diagram.

Front

What characterizes an endothermic reaction?

Back

An endothermic reaction absorbs energy from its surroundings, resulting in a positive heat of reaction.

Front

What characterizes an exothermic reaction?

Back

An exothermic reaction releases energy to its surroundings, resulting in a negative heat of reaction.

Front

What is the specific heat of copper?

Back

The specific heat of copper is 0.384 J/g°C.

Front

How do you calculate the heat absorbed by a substance?

Back

Heat absorbed (q) = specific heat (c) × mass (m) × change in temperature (ΔT).

Front

What is the significance of the lines in a potential energy diagram?

Back

Each line represents different energy states: reactants, products, activation energy, and heat of reaction.

Front

What is the relationship between temperature change and heat absorbed?

Back

The greater the temperature change, the more heat is absorbed, assuming mass and specific heat remain constant.