Physics Chapter 9

Qgained=-Qlost

Calorimetry, a problem solving approach to heat transfer problems, has the equation

c

During a phase change which of the following properties does not change? a. internal energy b. physical state c. temperature d. volume

KE is the energy of motion, so the faster the water particles move, the higher the temperature will be

Explain how the KE of molecules in water accounts for its temperature

d

How are the celcius and kelvin temperature scales similar? a. both scales are based on the freezing and boiling points of water b. both scales are based on absolute zero c. neither scale has negative temperature values d. the difference of one degree is the same for both scales

conduction, convection, radiation

What are three ways internal energy can be transferred from a hot object to a cooler object?

Cp=Q/m∆T

What is a formula used to find the specific heat capacity?

internal energy

What is the energy contained within the particles of a substance?

c

What is the energy due to the random motions of a substance's particles and the PE due to the bonds btwn those particles called? a. vibrational energy b. rotational energy c. translational energy d. internal energy

a

What is the energy transferred to or from a unit mass of a substance during a phase change called? a. latent heat b. specific heat capacity c. internal energy d. thermal energy

∆u=-(mghf-mghi)-(1/2mvf²-1/2mvi²)

What is the formula for change in internal heat?

Tk=Tc+273.15

What is the formula to change between celcius and kelvin?

Tf=9/5Tc+32

What is the formula to change between degrees celcius and farenheit?

c

What is the process by which energy is transferred by the motion of cold and hot mater? a. thermal conduction b. thermal insulation c. convection d. radiation

specific heat capacity

What is the quantity of energy needed to raise the temperature of a unit mass of a substance by 1 degree C called?

4.186 x 10³

What is the specific heat capacity of water?

d

What must be true if energy is to be transferred as heat btwn two bodies in physical contact? a. the two bodies must have diff volumes b. the two bodies must be at diff temps c. the two bodies must have different masses d. the two bodies must be in thermal equilibrium

a

What occurs to the particles in a substance at low temperature when energy is transferred to the substance as heat?

b

Which of the following is not a good thermal insulator? a. ceramic b. iron c. fiberglass d. cork

temperature

Which of the following is proportional to the average KE of particles in matter?

c

Which of the following statements correctly describes what occurs to a substance that undergoes thermal expansion? a. As the temperature increases, the volume of the substance increases b. As the temperature increases, the volume of the substance decreases c. As the temperature increases, the density of the substance increases d. As the temperature increases, the mass of the substance decreases

d

Which of the following statements est describes a state of thermal equilibrium btwn two systems? a. both systems have the same mass b. both systems have the same volume c. both systems have the same temperature d. both systems contain the same amount of internal energy

c

Which property of a substance is not needed to determine the amount of energy transferred as heat to or from the substance? a. temperature change b. specific heat capacity c. volume d. mass

Latent

_____ heat is heat gained or lost during phase changes