Thermodynamics Pre-Assessment

Front

What is an endothermic reaction?

Back

An endothermic reaction is a chemical reaction that absorbs energy from its surroundings, usually in the form of heat.

Front

What is an exothermic reaction?

Back

An exothermic reaction is a chemical reaction that releases energy to its surroundings, usually in the form of heat.

Front

True or False: An endothermic reaction can be denoted by a negative q-value.

Back

False. An endothermic reaction is denoted by a positive q-value.

Front

What effect does increasing the temperature have on the speed of a reaction?

Back

Increasing the temperature generally increases the speed of a reaction by providing more energy to the reactants.

Front

Which factor does NOT affect the speed of a reaction?

Back

Color of reactants.

Front

What is the role of a catalyst in a chemical reaction?

Back

A catalyst speeds up a chemical reaction without being consumed in the process.

Front

How does the concentration of reactants affect reaction speed?

Back

Increasing the concentration of reactants typically increases the speed of a reaction due to more frequent collisions.

Front

What is activation energy?

Back

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

Front

What is the difference between heat and temperature?

Back

Heat is the total energy of molecular motion in a substance, while temperature is a measure of the average kinetic energy of the molecules.

Front

What is thermal equilibrium?

Back

Thermal equilibrium is the state in which two objects in contact do not exchange heat, meaning they are at the same temperature.