Specific Heat and Radioactivity

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

• c

• Q

• m

• t

What  is the formula to calculate heat energy required to raise the temperature of any substance?

• Q=mc∆t

• Q=mc

• Q= ½mv

• m=QC

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

The specific heat of aluminum is 0.21 cal/g°C.  How much heat(Q) is released when a 10 g piece of aluminum foil is taken out of the oven and cools from 100° to 50°?

• 105 J

• 10.5 J

• 1.05 J

20 g of water. specific heat of water is 4.18 J/x°C.  temperature changes from 25° C to 20° C, how much heat energy (Q) moves from the water to the surroundings?

• 418 Joules

• 209 J

• 83 J

• 4.18 J

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

• 60ºC

• 40ºC

• -60ºC

• -40ºC

The specific heat of aluminum is 0.21 cal/g°C.  How much heat(Q) is released when a 10 g piece of aluminum foil is taken out of the oven and cools from 100° to 50°?

• 105 J

• 10.5 J

• 1.05 J

What is Specific Heat?

• The  amount of thermal energy required to increase the temperature of 1kg of a material by 1°C.
  

• The  amount of radiant energy required to increase the temperature of 1kgof a material by 1°C

• The  amount of energy required to increase the temperature of 1kgof a material by 1°C.

• The  amount of friction  required to increase the temperature of 1kgof a material by 1°C.

What would be the effect on the particles if more heat is supplied to the system?

• They would slow down

• They would stop moving

• They would speed up

• There would be no effect