ThermoChemistry 1

Multiple Choice

What is the definition of thermochemistry?

• Thermochemistry is the study of the energy changes, especially heat, associated with chemical reactions.
• Thermochemistry focuses on the color changes in chemical reactions.
• Thermochemistry is concerned with the speed of chemical reactions.
• Thermochemistry is the study of the physical properties of gases.

Multiple Select

Which of these are forms of energy?

• Heat

• Light

• Solar

• Sound

Multiple Choice

Heat flows from ______.

• lower temperature to higher temperature
• equal temperature to equal temperature
• from cold to hot
• higher temperature to lower temperature

Multiple Choice

What is temperature?

• Temperature is a measure of heat.
• Temperature is the amount of light in a room.
• Temperature measures the speed of sound.
• Temperature is a type of energy.

Multiple Choice

When you add heat energy, ____.

• the substance becomes solid
• the substance changes color
• molecules move faster

• the substance loses energy

Multiple Choice

What is chemical potential energy?

• Energy required to break chemical bonds
• Energy stored in the chemical bonds of a substance.

• Energy associated with temperature changes
• Energy released during a chemical reaction

Multiple Choice

What is an exothermic reaction?

• An exothermic reaction absorbs energy from the surroundings.
• An exothermic reaction occurs only in gases.
• An exothermic reaction is a reaction that releases energy, usually in the form of heat.
• An exothermic reaction is a type of chemical reaction that does not involve heat.

Multiple Choice

What is an endothermic reaction?

• An endothermic reaction is a reaction that absorbs heat.
• An endothermic reaction releases heat.
• An endothermic reaction occurs spontaneously without energy input.
• An endothermic reaction is a type of combustion reaction.

Multiple Choice

What does the law of conservation of energy state?

• Energy cannot be created or destroyed, only transformed.
• Energy can only be created from matter.
• Energy is always lost in transformations.
• Energy can be created and destroyed.

Multiple Select

Which of the following are units of energy?

• Joule

• Calorie

• Kilocalorie

• Gram

Complete 8-2: Thermochemistry Intro Quiz