Honors U4 Zone 3 Check

Front

What type of energy is described as the energy of motion?

Back

Kinetic energy is the energy of motion, which is the energy possessed by an object due to its movement.

Front

What is the formula used to calculate the enthalpy change of a reaction?

Back

ΔH_rxn = ΣΔH_f (products) - ΣΔH_f (reactants) is the formula used to calculate the enthalpy change of a reaction.

Front

In the reaction C + O2 --> CO2 + 60kJ, what is the value for ΔH?

Back

The value for ΔH in this reaction is -60 kJ, indicating that the reaction releases energy.

Front

What does the symbol Δ represent when included in chemical equations?

Back

The symbol Δ represents a change in heat, specifically the change in enthalpy during a reaction.

Front

What does it mean if a reaction is exothermic?

Back

An exothermic reaction is one that releases heat to its surroundings, resulting in an increase in temperature.

Front

What does it mean if a reaction is endothermic?

Back

An endothermic reaction absorbs heat from its surroundings, resulting in a decrease in temperature.

Front

What is the definition of enthalpy?

Back

Enthalpy is a measure of the total heat content of a system, often used to describe heat changes in chemical reactions.

Front

What is activation energy?

Back

Activation energy is the minimum energy required for a chemical reaction to occur.

Front

What role do catalysts play in chemical reactions?

Back

Catalysts increase the rate of a reaction by lowering the activation energy required for the reaction to proceed.

Front

What is the difference between potential energy and kinetic energy?

Back

Potential energy is stored energy based on an object's position, while kinetic energy is the energy of motion.