Quiz on Thermodynamics

In what units is temperature measured?

• degrees Celsius

• kelvins

• both degrees Celsius and kelvins

• None of the above

The greater the kinetic energy of the particles in a sample of matter,

• the higher the temperature is.

• the lower the temperature is.

• the more energy is absorbed by the sample as heat.

• the less energy is released by the sample as heat.

The Greek letter Delta (triangle) stands for

• "heat stored in."

• "mass of."

• "rate of."

• "change in."

Which of the following is a measure of the disorder in a system?

• entropy

• enthalpy

• free energy

• temperature

What is the symbol for entropy?

• T

• H

• G

• S

Which of the following substances has the highest entropy?

• steam

• ice water

• liquid water

• crushed ice

A reaction is spontaneous if Delta G is

• zero.

• negative.

• positive.

• greater than delta H.

The minimum energy required for an effective collision is called

• energy of enthalpy.

• activation energy.

• free energy.

• kinetic energy.

Which of the following affects reaction rate?

• the nature of reactants

• surface area of reactants

• temperature

• All of the above

If the surface area of reactants is larger,

• the reaction rate is generally higher.

• the reaction rate is generally lower.

• the reaction rate is not affected.

• the rate-determining step is eliminated.