Thermal Energy & Heat Transfer

Definitions

100

The total KE of moving particles of an object.

What is Thermal Energy? 

200

A material that allows heat to flow across it very easily. 

What is Conductor? 

300

The average KE of each individual particle of an object. 

What is Temperature? 

400

This refers to the transfer of thermal energy from one object to another. 

What is Heat? 

500

The amount of heat needed to raise one gram of a substance by one degree Celsius. 

What is Specific Heat? 

Solving!

100

c = 99

m = 4 kg

T(initial) = 34^oC

T(final) = 56^oC

Q = ? 

8,712 J

200

c = 22

m = 64.5 kg

T(initial) = 78^oC

T(final) = 82^oC

5,676 J

300

c = 4.5

m = 1,021 kg

T(initial) = 78^oC

T(final) = 102^oC

110,268 J

400

c = 14

m = 14 kg

T(initial) = 14^oC

T(final) = 14,140,014^oC

2,771,440,000 J

500

c = 4.3362

m = 89.253 kg

T(initial) = 78^oC

T(final) = 4552^oC

1,731,522.373 J

Conduction, Convection, Radiation

100

A space heater. 

What is Radiation? 

200

Burning your hand on an electrical oven burner by touching it when its hot. 

What is Conduction? 

300

Water on the ground is heated by the sun, evaporates,  and rises. Water in the upper atmosphere cools and sinks (rain). This creates the water cycle and is an example of this process. 

What is Convection? 

400

Holding your hands close to a camp fire on a cold evening to warm them up. 

What is Radiation? 

500

DOUBLE JEOPARDY! This question is worth double the points. 

Give a unique example of convection, conduction, and radiation. It can be three separate examples, or a process that includes all three. 

What is... ? 

Stuff

100

Heat moves from materials of _________ temperature to ___________ temperature.

What is Higher; Lower?

200

In a cup of ice water heat transfer from the _________ to the __________, cooling down the drink.

What is Water; Ice? 

300

A Styrofoam cooler is an example of a(n) ____________, which works by not letting heat pass through it very easily keeping your drinks cold on a hot day.  

What is Insulator? 

400

Between a hot cup of coffee and a room temperature fish pond, this has the greater thermal energy. 

What is Fish Pond? 

500

Object A and Object B are placed on the same heating source at the same temperature. It takes Object B twice as long to heat up compared to Object A. This object has the lower specific heat.

What is Object A? 

Past Test Review

100

____ energy refers to energy of movement, whereas ______ energy refers to stored energy. 

What is Kinetic; Potential? 

200

This is the total KE + PE. 

What is Mechanical Energy? 

300

This measures how much energy is transferred into an object when a force is exerted on it. It can be found by using force and distance. 

What is Work? 

400

This type of energy is found in both the core of the sun and in certain types of power plants. 

What is Nuclear Energy? 

500

Measured in Watts, this is the rate at which work is done. 

What is Power?