3.21.23 Heat

Which equation do we use to calculate the heat gained by water?

• T₂ - T₁ = 𝝙T

• m𝝙TC_p = H

• ℃

• C_p = H / (m𝝙T)

Definition of heat

• measure of the average kinetic energy per molecule

• energy transferred between 2 objects or substances that are at different temperatures

• heat

The symbol for specific heat is .......

• Cp

• H

• m

• T

A sample of water has a mass of 10.0 g. The initial temperature of the water is 25℃. It is cooled to 10 ℃. The specific heat of water is 1 cal/g℃. What is the change in temperature of the water?

• 15℃

• -15℃

• 150 cal

• -150 cal

When a substance cools, the change in temperature is ____________. When a substance heats up, the change in temperature is ____________.

• negative; positive

• positive; negative

• remains constant; positive

• negative; remains constant

• remains constant; remains constant