Gas Laws

Question 1

State Boyle’s Law for a perfect gas.

Answer 1

For a fixed amount of gas at a constant temperature, the pressure (P) and volume (V) are inversely proportional to each other.

Question 2

State Charles’ Law for a perfect gas.

Answer 2

At constant pressure, the volume (V) of a given amount of gas is directly proportional to its absolute temperature (T).

Question 3

Express Charles’ Law as an equation, and state the units used.

Answer 3

Volume ÷ Temperature = Constant
Kelvin (K) 273.15K = 0°C

Question 4

State the meaning of the term ideal gas.

Answer 4

An ideal gas is a theoretical concept in the field of thermodynamics and gas physics that represents a simplified model for describing the behavior of gases under certain conditions. Ideal gases are a useful approximation for real gases in many situations, particularly at relatively low pressures and high temperatures.

An ideal gas is described by the ideal gas law, which relates the pressure (P), volume (V), temperature (T), and the number of moles (n) of gas particles through the equation: PV = nRT, where R is the gas constant.

Question 5

State the general equation for a perfect gas.

Answer 5

PV = nRT