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Thermal Science Quiz

#1

What is the unit of heat in the International System of Units (SI)?

Joule
Explanation

Basic unit of energy.

#2

What is the specific heat capacity of water?

4 J/g°C
Explanation

Amount of heat water can store.

#3

Which gas law describes the relationship between pressure and volume at constant temperature?

Boyle's Law
Explanation

Inversely proportional relationship.

#4

What is the relationship between temperature and the average kinetic energy of molecules in an ideal gas?

Direct
Explanation

Proportional relationship.

#5

What is the unit of power in the International System of Units (SI)?

Watt
Explanation

Rate of energy transfer.

#6

Which law of thermodynamics states that energy cannot be created or destroyed, only converted from one form to another?

First Law
Explanation

Conservation of energy principle.

#7

What is the process called when a substance changes directly from a solid to a gas without passing through the liquid phase?

Sublimation
Explanation

Solid to gas transition without liquid phase.

#8

What is the name of the process in which a gas turns into a liquid?

Condensation
Explanation

Gas to liquid transition.

#9

In a refrigeration cycle, which component is responsible for absorbing heat from the refrigerated space?

Evaporator
Explanation

Absorbs heat to vaporize refrigerant.

#10

What is the primary purpose of a heat exchanger?

Transfer heat between fluid streams
Explanation

Facilitates heat transfer.

#11

In a Carnot heat engine, what does the efficiency depend on?

Temperature of the source and sink
Explanation

Efficiency is based on temperature difference.

#12

What is the critical point of a substance in thermodynamics?

The point where liquid and gas phases are indistinguishable
Explanation

Where liquid and gas become identical.

#13

Which law of thermodynamics is also known as the law of entropy?

Second Law
Explanation

Law of increasing disorder.

#14

What is the efficiency of an ideal Carnot heat engine operating between two reservoirs at temperatures T1 and T2?

1 - (T2 / T1)
Explanation

Efficiency formula based on temperature.

#15

What is the name of the point at which a substance exists simultaneously as a liquid and a vapor?

Critical Point
Explanation

State of coexistence.

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