Heat & Thermodynamics MCQs with Answers

What is ΔH equal to according to the first law of thermodynamics?

• A.ΔE ÷ P ΔV
• B.ΔE − P ΔV
• C.ΔE × P ΔV
• D.ΔE + P ΔV

Which of the following does NOT make use of the expansion and contraction of materials?

• A.Thermometer
• B.Bimetallic strip thermostat
• C.Electric fan
• D.Railway track gaps

Which equation is used to find the concentration for n moles of an ideal gas?

• A.nRT/V
• B.RT/P
• C.PV/nR
• D.P/RT

Past Paper MCQ

How many joules are equivalent to 1 BTU?

• A.955 joules
• B.1000 joules
• C.1100 joules
• D.1055 joules

A real gas can be approximated to an ideal gas at ?

• A.High pressure and low temperature
• B.Low pressure and high density
• C.High density and low temperature
• D.Low density

What plays an important role in determining the hottest temperature the human body can tolerate?

• A.Altitude
• B.Humidity
• C.Wind speed
• D.Atmospheric pressure

Knocking the efficiency of an engine?

• A.Increases
• B.Decreases
• C.Does not affect
• D.Doubles

The value of Boltzmann's constant is _?

• A.1.38 × 10⁻²³ J/K
• B.6.63 × 10⁻³⁴ J·s
• C.8.314 J/mol·K
• D.9.8 × 10⁻²³ J/K

The amount of heat needed to convert a substance from liquid to gas is called?

• A.Heat of fusion
• B.Heat of vaporization
• C.Specific heat capacity
• D.Latent heat of sublimation

Which of the following has the maximum density?

• A.Water
• B.Ice
• C.Steam
• D.Water vapour