Enthalpy change

The video tutorial explains enthalpy changes in chemical reactions at constant pressure. It covers positive enthalpy changes, known as endothermic processes, where energy is absorbed, such as ice melting. It also discusses negative enthalpy changes, or exothermic processes, where energy is released, like in combustion. The tutorial highlights the practical use of exothermic reactions to harness chemical energy for powering various applications.

What is the term used to describe the energy change in a chemical system at constant pressure?

• Entropy

• Enthalpy

• Kinetics

• Thermodynamics

Which of the following describes a process where energy is absorbed from the surroundings?

• Adiabatic

• Endothermic

• Isothermal

• Exothermic

What happens to ice when it undergoes an endothermic process?

• It sublimates

• It freezes

• It melts

• It evaporates

What is the term for a process where energy is released to the surroundings?

• Exothermic

• Isobaric

• Isochoric

• Endothermic

How can negative enthalpy changes be utilized in practical applications?

• To release energy for power

• To cool down systems

• To increase entropy

• To store energy