Specific Heat

What is the symbol for Thermal Energy?

• Q
• t
• m
• C

What unit do you use to measure Thermal Energy?

• J/Kg ºC
• Kg
• ºC
• J

What is the symbol for Specific Heat

• Q
• t
• m
• C

What is the equation to measure change in Thermal Energy?

• Q=mc∆t
• Q=mc
• Q= ∆mct
• m=QC

A material was cooled from 100ºC to 40ºC.  What is the temperature change?

• 60ºC
• 40ºC
• -60ºC
• -40ºC

What does temperature measure?

• Heat
• ºC
• Kinetic Energy
• Thermal Energy

How does heat flow?

• Always from cold to warm
• Always from warm to cold
• Both warm to cold & cold to warm
• It depends on the temperature

What does  $\Delta T$  represent?

•  $t_{f\ }-t_i$  

•  $t_{i\ }-t_f$  

• t - celsius

• celsius - t

The specific heat(c) of copper is 0.39 J/g °C. What is the temperature change(∆t) when 100 Joules of heat(Q) is added to 20 grams?

• 12.82 °C
• 24.12°C
• 351 °C

Calculate the heat absorbed by 105.0 grams of water when it is heated to cook spaghetti. The initial temperature of the water is 20.0°C, and the final temperature of the water is 99.0°C. The specific heat of water is 4.18 J/g•°C.

• 8778 J/g°C
• 0.0005 J/g°C
• 34673 J/g°C
• 43451.1 J/g°C