The First Law of Thermodynamics is also known as:
a) Law of Entropy
b) Law of Conservation of Energy
c) Law of Absolute Zero
d) Law of Thermal Expansion
The Second Law of Thermodynamics states that:
a) Energy can neither be created nor destroyed
b) Heat flows from a colder body to a hotter body naturally
c) The entropy of an isolated system always increases
d) Work can be converted into heat without any loss
The Zeroth Law of Thermodynamics is essential for:
a) Defining entropy
b) Establishing temperature equilibrium
c) Explaining heat transfer
d) Understanding energy conservation
The Third Law of Thermodynamics states that:
a) The entropy of a perfect crystal at absolute zero is zero
b) Energy cannot be created or destroyed
c) Heat transfer occurs only at absolute zero
d) Work can be completely converted into heat
Which of the following is a consequence of the Second Law of Thermodynamics?
a) Heat naturally flows from hot to cold
b) Energy can be recycled indefinitely
c) A perpetual motion machine of the first kind is possible
d) Entropy decreases in all natural processes
Which thermodynamic law explains why a refrigerator requires energy to function?
a) Zeroth Law
b) First Law
c) Second Law
d) Third Law
Which equation represents the First Law of Thermodynamics?
a)
𝑄
=
𝑚
𝑐
Δ
𝑇
Q=mcΔT
b)
Δ
𝑈
=
𝑄
−
𝑊
ΔU=Q−W
c)
𝑃
𝑉
=
𝑛
𝑅
𝑇
PV=nRT
d)
𝑆
=
𝑘
ln
𝑊
S=klnW
Δ
𝑈
=
𝑄
−
𝑊
ΔU=Q−W
What does entropy measure?
a) The total energy of a system
b) The disorder of a system
c) The absolute temperature of a system
d) The mass of a system
A heat engine operates between two reservoirs at different temperatures. According to the Second Law of Thermodynamics:
a) It is 100% efficient
b) Some energy is always lost as waste heat
c) No work can be done
d) It does not require a temperature difference
The term “heat death of the universe” refers to:
a) The temperature of space reaching absolute zero
b) The eventual increase of entropy leading to no usable energy
c) A massive explosion of all matter
d) The Sun consuming all planets
Which process violates the Second Law of Thermodynamics?
a) Heat flowing from hot to cold
b) Work being done by an engine with some energy loss
c) Heat spontaneously moving from cold to hot
d) Entropy increasing in an isolated system
Which thermodynamic law establishes the concept of temperature?
a) First Law
b) Second Law
c) Zeroth Law
d) Third Law
The efficiency of a Carnot engine depends on:
a) The entropy change
b) The heat capacity
c) The temperatures of the hot and cold reservoirs
d) The amount of fuel burned
What happens to entropy when a system reaches absolute zero?
a) It becomes infinite
b) It decreases to zero
c) It remains constant
d) It randomly fluctuates
A process that occurs at constant temperature is called:
a) Isothermal
b) Adiabatic
c) Isobaric
d) Isochoric
An adiabatic process occurs when:
a) No heat is exchanged with the surroundings
b) Pressure remains constant
c) Temperature remains constant
d) Volume remains constant
Which thermodynamic cycle is used in steam power plants?
a) Carnot cycle
b) Otto cycle
c) Rankine cycle
d) Diesel cycle
A reversible process is one that:
a) Occurs with no energy loss
b) Is spontaneous
c) Increases entropy
d) Cannot be undone
Entropy always increases in:
a) A closed system
b) An isolated system
c) An open system
d) A reversible process
Which of the following is an example of an irreversible process?
a) Ice melting
b) Expansion of an ideal gas in a vacuum
c) Water freezing at 0°C
d) Ideal gas compression
Which quantity is conserved in all thermodynamic processes?
a) Entropy
b) Work
c) Energy
d) Temperature
Which gas law is most closely related to the First Law of Thermodynamics?
a) Boyle’s Law
b) Charles’s Law
c) Gay-Lussac’s Law
d) The Ideal Gas Law
A heat pump transfers heat:
a) From hot to cold
b) From cold to hot
c) Without energy input
d) With zero efficiency
What happens in an isolated system over time according to the Second Law of Thermodynamics?
a) Entropy remains constant
b) Entropy decreases
c) Entropy increases
d) Temperature decreases
Which of the following is an example of a thermodynamic system?
a) A steam engine
b) A refrigerator
c) A car engine
d) All of the above
What is the efficiency of a Carnot engine operating between 600K and 300K?
a) 25%
b) 33%
c) 50%
d) 66%
What is the standard unit of entropy in the SI system?
a) Joule (J)
b) Watt (W)
c) Joule per Kelvin (J/K)
d) Kelvin (K)
The Third Law of Thermodynamics is important in:
a) Cryogenics
b) Rocket science
c) Nuclear fusion
d) Combustion engines
