Thermodynamics Vocab 1

Which is NOT a kind of kinetic energy?

• Molecular vibrations

• Atomic vibrations in a solid

• Energy due to an electron's position in the atom

• Energy due to an electron's velocity

Which is NOT potential energy?

• Energy of water at the top of a dam

• Energy in a chemical bond which is at rest

• Energy in a nuclear bomb before it is detonated

• Energy in a chemical bond where the molecule is in motion

• All of these are potential energy

Which of these is related to Fd where F is force and d is distance?

• heat

• work

What is a true statement about state functions like delta E (change in internal energy)?

• We can measure the initial and final energies, so we can measure state functions.

• We need to know how the reaction went from the initial and final states because the activation energies could be different.

• They don't depend on how something happens, only on the difference between the energies of the initial and final states.

The total energy of a closed system is the

• Kinetic Energy

• Potential Energy

• Internal Energy

• Chemical Energy

Which is NOT a statement of the 1st Law of Thermodynamics?

• Energy in the universe is constant.

• Energy cannot just appear.

• The sun's energy that we don't use is lost.

• Energy transformations always generate heat.

In an exothermic reaction, heat would be written on the

• left side of the reaction

• right side of the reaction

An endothermic reaction requires

• an input of energy to the reactants

• an input of energy to the products

Enthalpy is the same as ________________ at constant pressure.

• heat

• internal energy

• work

• Potential Energy

What is transferred between a hot and cold object?

• temperature in degrees C or K

• heat in joules or kilojoules

• cold in joules or kilojoules