Temperature & Heat

Energy transferred from a higher temperature object to a lower temperature object is _______.

• heat

• kinetic energy

• thermal energy

• internal energy

Which best describes temperature?

• It is equal to the heat difference between two objects

• It is proportional to the total energy in an object

• It is proportional to the average kinetic energy of particles in an object

• It is equal to an object's specific heat capacity

Which is the sum of the kinetic and potential energies of an object?

• Heat energy

• Specific heat energy

• Thermal energy

• Temperature

How much heat is required to raise the temperature of a 225 g lead ball from 15.0 ^oC C to 25.0 ^oC? The specific heat of lead is 128 J/kg.K

• 725 J

• 576 J

• 145 J

• 288 J

If you wanted to know how much the temperature of a particular piece of material would rise when a known amount of heat was added to it, which of the following quantities would be most helpful to know?

• initial temperature

• specific heat

• density

• coefficient of linear expansion

Which thermal exchange process does not require a medium?

• Conduction

• Convection

• Radiation

• Evaporation

Which thermal exchange process carries thermal energy through boiling water as it heats up on top of a stove?

• Conduction

• Convection

• Radiation

• Evaporation

Two beakers A & B contain water at a temperature of 40 ^oC. Beaker A contains 100 g of water and beaker B contains 250 g of water. Which of the following statements is true about them?

I. Beaker A has less thermal energy than Beaker B

II. Both beakers A and B have the same thermal energy

III. The water molecules in both beakers A and B have the same average kinetic energy

• I only

• II only

• III only

• I and III only

Two isolated objects, at different temperatures, are put in contact with each other. Which of the following is/ are true when the system reaches thermal equilibrium?

I. The cool object gains the same amount of heat lost by the warm object.

II. Both objects will have the same final temperature

III. Both objects lose the same amount of heat

• I only

• II only

• I and II only

• II and III only