First and Second laws of Thermodynamics

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This tasks from physics. Topic: First and Second laws of Thermodynamics
Author: Gabit Shakhmardan

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Шахмардан Ғабит

Kazajstán

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Froggy Jumps First and Second laws of ThermodynamicsVersión en línea This tasks from physics. Topic: First and Second laws of Thermodynamics Author: Gabit Shakhmardan por Шахмардан Ғабит 1 What does the First Law of Thermodynamics describe? a Energy is destroyed b Energy is conserved c Energy is lost 2 Which form can energy take in thermodynamics? a Heat and work b Heat and mass c Work and force 3 What does the Second Law of Thermodynamics state? a Heat flows from cold to hot b Heat flows from hot to cold c Heat stays constant 4 Why can’t heat flow from cold to hot naturally? a Because of energy loss b Because of pressure c Because of entropy increase 5 A system receives 100 J of heat and does 40 J of work. What is the change in internal energy? a 60 J b 140 J c 40 J 6 A system loses 50 J of heat and no work is done. What happens to internal energy? a -50 J b + 50 J c 0 7 A system loses 20 J of heat and does 10 J of work. What is ΔU? a 30 J b -10 J c -30 J 8 What is the formula of the First Law of Thermodynamics? a ΔU = Q + W b ΔU = Q − W c ΔU = W − Q 9 What does Q represent in thermodynamics? a Work b Heat c Energy loss 10 In an isothermal process, what happens to internal energy (ideal gas)? a Increases b Decreases c Does not change 11 In an isobaric process, heat goes to… a Only work b Only internal energy c Internal energy and work 12 In which process is ΔU = Q? a Isothermal b Isochoric c Isobaric

Froggy Jumps

First and Second laws of ThermodynamicsVersión en línea

This tasks from physics. Topic: First and Second laws of Thermodynamics Author: Gabit Shakhmardan

por Шахмардан Ғабит

What does the First Law of Thermodynamics describe?

Energy is destroyed

Energy is conserved

Energy is lost

Which form can energy take in thermodynamics?

Heat and work

Heat and mass

Work and force

What does the Second Law of Thermodynamics state?

Heat flows from cold to hot

Heat flows from hot to cold

Heat stays constant

Why can’t heat flow from cold to hot naturally?

Because of energy loss

Because of pressure

Because of entropy increase

A system receives 100 J of heat and does 40 J of work. What is the change in internal energy?

60 J

140 J

40 J

A system loses 50 J of heat and no work is done. What happens to internal energy?

-50 J

+ 50 J

A system loses 20 J of heat and does 10 J of work. What is ΔU?

30 J

-10 J

-30 J

What is the formula of the First Law of Thermodynamics?

ΔU = Q + W

ΔU = Q − W

ΔU = W − Q

What does Q represent in thermodynamics?

Work

Heat

Energy loss

In an isothermal process, what happens to internal energy (ideal gas)?

Increases

Decreases

Does not change

In an isobaric process, heat goes to…

Only work

Only internal energy

Internal energy and work

In which process is ΔU = Q?

Isothermal

Isochoric

Isobaric

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First and Second laws of Thermodynamics

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First and Second laws of ThermodynamicsVersión en línea

por Шахмардан Ғабит

What does the First Law of Thermodynamics describe?

Which form can energy take in thermodynamics?

What does the Second Law of Thermodynamics state?

Why can’t heat flow from cold to hot naturally?

A system receives 100 J of heat and does 40 J of work. What is the change in internal energy?

A system loses 50 J of heat and no work is done. What happens to internal energy?

A system loses 20 J of heat and does 10 J of work. What is ΔU?

What is the formula of the First Law of Thermodynamics?

What does Q represent in thermodynamics?

In an isothermal process, what happens to internal energy (ideal gas)?

In an isobaric process, heat goes to…

In which process is ΔU = Q?

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