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How are the graphs for A. Boyle’s Law B. Pressure Law C. Charles law?
A. Boyle’s Law
Boyle’s law states that the the volume (V) of a given mass of a gas is inversely proportional to its pressure (P) provided the temperature remains constant.
V ∝ (1/P) at constant temperature.
Graphical Representation for Boyle’s law
Graph 1: It is the P-V curve which shows that as the pressure (atm) of the gas increases, its volume (litres) decreases.
Graph 2: It is the P-PV curve which indicates that the product of pressure (atm) and volume (litres) of a given mass of a gas is constant if temperature remains constant.
Graph 3: It is the P-(1/V) curve which gives a straight line, indicating that pressure (atm) is directly proportional to the inverse of the volume (litres) of a gas.
B. Pressure Law
Pressure law or Pressure-Temperature law states that at a constant volume, the pressure of a given mass of a gas decreases or increases by 1/273 of its pressure at 0°C for every 1°C rise or fall in the temperature. The graph of this law gives a straight line.
C. Charle’s law
Charle’s law states that the volume of a given mass of a gas either decreases or increases by 1/273 of its volume at 0°C for every 1°C rise or fall in the temperature, provided the pressure is kept constant.
V ∝ T (at constant pressure).
Graphical Representation for Charle’s law
The graph of Charle’s law represents the straight line indicating that the volume (in litre) of a given mass of a gas is directly proportional to its absolute temperature (in Kelvin) provided pressure remains constant.
