Quiz: Thermo Quest


Thermo QuestOnline version Thermodynamics basics quiz by VyndktvX 1 What is the equation for the change in internal energy (U) of a system? a U = q - w b U = q + w c U = q d U = w - q 2 Which process is endothermic according to the material? a Combustion b Rusting of iron c Freezing of water d Photosynthesis 3 In thermodynamics, what is thermal energy transfer between bodies due to temperature difference called? a Heat b Energy c Work d Temperature 4 Which of the following is an exothermic change? a Cooking an egg b Melting of ice c Evaporation d Photosynthesis 5 What is another name for the First Law of Thermodynamics as described in the slides? a Law of Conservation of Energy b Absolute Energy Principle c Law of Entropy d Second Law 6 Which term refers to a energy change that releases energy to the surroundings? a Isothermal b Adiabatic c Exothermic d Endothermic 7 What is the symbol for heat absorbed or evolved in the First Law equation? a q b U c T d w 8 If a system absorbs 50 J of heat and does 15 J of work on the surroundings, what is U change? a 35 J b -35 J c 65 J d -65 J 9 What does the variable w represent in the thermodynamics context from the slides? a Heat exchanged b Temperature change c Work performed by the system or on the system d Internal energy 10 If a reaction releases heat and does work on the surroundings, how is U typically characterized? a Zero b Undefined c Negative (decrease in internal energy) d Positive (increase in internal energy) Feedback 1 Internal energy changes equal heat added plus work done on the system. 2 Endothermic processes absorb heat; photosynthesis is given as endothermic in the material. 3 Heat is energy in transit due to temperature difference. 4 The correct exothermic example is not melting of ice; note: in provided activities, melting was listed as ENDO, but common thermodynamics teaching marks melting as endothermic. Use the material's examples: the activity list shows endo for melting of ice. 5 It states energy cannot be created or destroyed, only transformed. 6 Exothermic processes release energy; endothermic absorb energy. 7 q represents heat in the equation U = q + w. 8 U = q + w = 50 + (-15) = 35 J. 9 w is the work term in U = q + w. 10 When heat is released and work is done by the system, U tends to decrease (negative change).

1

What is the equation for the change in internal energy (U) of a system?

a

U = q - w

b

U = q + w

c

U = q

d

U = w - q

2

Which process is endothermic according to the material?

a

Combustion

b

Rusting of iron

c

Freezing of water

d

Photosynthesis

3

In thermodynamics, what is thermal energy transfer between bodies due to temperature difference called?

a

Heat

b

Energy

c

Work

d

Temperature

4

Which of the following is an exothermic change?

a

Cooking an egg

b

Melting of ice

c

Evaporation

d

Photosynthesis

5

What is another name for the First Law of Thermodynamics as described in the slides?

a

Law of Conservation of Energy

b

Absolute Energy Principle

c

Law of Entropy

d

Second Law

6

Which term refers to a energy change that releases energy to the surroundings?

a

Isothermal

b

Adiabatic

c

Exothermic

d

Endothermic

7

What is the symbol for heat absorbed or evolved in the First Law equation?

a

q

b

U

c

T

d

w

8

If a system absorbs 50 J of heat and does 15 J of work on the surroundings, what is U change?

a

35 J

b

-35 J

c

65 J

d

-65 J

9

What does the variable w represent in the thermodynamics context from the slides?

a

Heat exchanged

b

Temperature change

c

Work performed by the system or on the system

d

Internal energy

10

If a reaction releases heat and does work on the surroundings, how is U typically characterized?

a

Zero

b

Undefined

c

Negative (decrease in internal energy)

d

Positive (increase in internal energy)

Feedback

1

Internal energy changes equal heat added plus work done on the system.

2

Endothermic processes absorb heat; photosynthesis is given as endothermic in the material.

3

Heat is energy in transit due to temperature difference.

4

The correct exothermic example is not melting of ice; note: in provided activities, melting was listed as ENDO, but common thermodynamics teaching marks melting as endothermic. Use the material's examples: the activity list shows endo for melting of ice.

5

It states energy cannot be created or destroyed, only transformed.

6

Exothermic processes release energy; endothermic absorb energy.

7

q represents heat in the equation U = q + w.

8

U = q + w = 50 + (-15) = 35 J.

9

w is the work term in U = q + w.

10

When heat is released and work is done by the system, U tends to decrease (negative change).

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Thermo Quest

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Thermo QuestOnline version

by VyndktvX

What is the equation for the change in internal energy (U) of a system?

Which process is endothermic according to the material?

In thermodynamics, what is thermal energy transfer between bodies due to temperature difference called?

Which of the following is an exothermic change?

What is another name for the First Law of Thermodynamics as described in the slides?

Which term refers to a energy change that releases energy to the surroundings?

What is the symbol for heat absorbed or evolved in the First Law equation?

If a system absorbs 50 J of heat and does 15 J of work on the surroundings, what is U change?

What does the variable w represent in the thermodynamics context from the slides?

If a reaction releases heat and does work on the surroundings, how is U typically characterized?

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