Exploring Exothermic and Endothermic Reactions

What type of reaction releases heat?

• Exothermic reaction

• Endothermic reaction

• Isometric reaction

• Isobaric reaction

What is the primary focus of thermochemistry?

• The study of energy conservation in physical processes

• The study of temperature changes in physical reactions

• The study of pressure changes in chemical reactions

• The study of heat involved in chemical reactions

What law states that energy cannot be created or destroyed?

• Law of energy conservation

• First law of thermodynamics

• Law of conservation of mass

• Second law of thermodynamics

What type of energy is associated with motion?

• Nuclear energy

• Kinetic energy

• Potential energy

• Chemical energy

Which system allows no transfer of mass or energy to its surroundings?

• Isolated system

• Closed system

• Dynamic system

• Open system

What describes an open system in thermochemistry?

• A system that exchanges only mass with its surroundings

• A system that exchanges only energy with its surroundings

• A system that exchanges both energy and mass with its surroundings

• A system that exchanges neither energy nor mass with its surroundings

What is required to initiate an exothermic reaction?

• Activation energy

• Kinetic energy

• Potential energy

• Thermal energy

What is the energy of activation?

• The total energy conserved in a chemical reaction

• The initial energy required to start a chemical reaction

• The energy absorbed during an endothermic reaction

• The energy released during an exothermic reaction

What does the specific heat capacity of a substance indicate?

• The amount of heat needed to raise the temperature of 1 kg of the substance by 1°C

• The amount of heat needed to raise the temperature of 1 g of the substance by 1°C

• The amount of heat needed to lower the temperature of 1 kg of the substance by 1°C

• The amount of heat needed to lower the temperature of 1 g of the substance by 1°C

How is heat calculated in a chemical reaction?

• E = mc^2

• H = U + PV

• Q = mCΔT

• Q = m/v