Answers25-26 CHEMISTRY IN THE EARTH SYSTEM S1Energy

Heat Answers

10 verified answers
1
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Which substance has the most thermal energy and will have the most heat flow from it?

A
a stovetop burner on medium (200°C)
B
a nuclear reactor core (1000°C)
C
the human body (36°C)
D
air at room temperature (32°C)
2
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Which direction does heat flow from?

A
hot to cold
B
cold to hot
C
hot to hot
D
cold to cold
3

This chart lists four examples of two objects that are in contact.Which statement accurately describes the flow of heat in each example?

Question illustration
A
Heat will flow from Object 1 to Object 2 in examples 2 and 4, and heat will flow from Object 2 to Object 1 in examples 1 and 3.
B
Heat will flow from Object 1 to Object 2 in examples 1 and 3, and heat will flow from Object 2 to Object 1 in examples 2 and 4.
C
Heat will flow from Object 1 to Object 2 in Example 3, and heat will flow from Object 2 to Object 1 in examples 1, 2, and 4.
D
Heat will flow from Object 1 to Object 2 in examples 1, 2, and 4, and heat will flow from Object 2 to Object 1 in Example 3.
4

Shelly tells a friend that her computer needs to be fixed because it has been producing a lot of heat and is smoking. Where is the error in her statement?

A
Heat cannot be described as having been produced.
B
Thermal energy cannot be produced by electronics.
C
Her computer should be producing a lot of heat and does not need to be fixed.
D
Her computer is producing thermal energy, not heat.
5

The metal aluminum coils in an air conditioner conduct thermal energy from inside the house and release it outside the house. What can be said about the coils when they are accepting the heat inside the house?

A
They must be warmer than the air inside the house.
B
They must be cooler than the air inside the house.
C
They must have more thermal energy than the air inside the house.
D
They must be more insulated than the air inside the house.
6

Heat is most closely related to which kind of energy?

A
nuclear
B
electrical
C
thermal
D
chemical
7

What must be true about two objects if heat is flowing between them?

A
The objects must be different temperatures.
B
The objects must be the same temperature.
C
The objects must both be over room temperature.
D
The objects must both be under room temperature.
8

Isaac wants to make s'mores. He holds a marshmallow on a metal skewer over a fire. A few seconds later, the marshmallow is cooked and the skewer feels warm. What most likely happened?

A
The fire heated the surrounding air, which cooked the marshmallow.
B
The heat generated from the marshmallow flowed in the form of thermal energy to the skewer and fire.
C
The heat from the skewer cooked the marshmallow.
D
Thermal energy in the form of heat moved from the fire to the skewer and marshmallow.
9

Which best describes the direction of heat?

A
from a substance with no thermal energy to a substance with high amounts of thermal energy
B
from a substance with less thermal energy to a substance with more thermal energy
C
from a cooler substance to a warmer substance
D
from a warmer substance to a cooler substance
10

Which refers to the amount of heat required to change the temperature of 1 gram of a substance by 1°C and is related to the chemical composition of the substance?

A
Thermal energy
B
Specific heat
C
Activation heat
D
Boiling point

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