Q4 GENCHEM2 REVIEWER

What type of energy change occurs when a reaction absorbs heat from its surroundings?

• Chemical

• Endothermic

• Exothermic

• Physical

What is the main energy change in an endothermic reaction?

• Energy is absorbed from the surroundings

• Energy is released as heat

• No energy change occurs

• Energy is converted into sound

During an exothermic reaction, energy is primarily released in what form?

• Heat

• Light

• Sound

• Work

What form of energy is often released in an exothermic reaction?

• Electrical energy

• Light and heat energy

• Sound energy

• Nuclear energy

The First Law of Thermodynamics is essentially a statement of what fundamental principle?

• Entropy increase

• Energy conservation

• Heat transfer direction

• Equilibrium establishment

In the context of the First Law, what does the term "internal energy" refer to?

• Heat transferred into the system only.

• External forces applied to the system.

• Total energy contained within the system.

• Work performed by the system on its surroundings.

In which reaction is heat absorbed from the surroundings?

• Respiration

• Neutralization

• Freezing

• Photosynthesis

Which of the following reactions releases energy in the form of heat and light?

• Dissolving salt in water

• Exploding fireworks

• Cooking an egg

• Melting ice cream

What does the First Law of Thermodynamics state?

• Energy can be created and destroyed

• Energy cannot be transferred or converted

• Energy cannot be created or destroyed, only transformed

• Energy is always lost in any process

What thermodynamic property is defined as the sum of a system's internal energy and the product of its pressure and volume?

• Entropy

• Enthalpy

• Gibbs free energy

• Work.