Question

Ideal gas equation is also called the equation of state because :
a.) It depends on states of matter
b.) It is a relation between four variables and describe the state of any gas
c.) It is a combination of various gas laws and any variable can be calculated
d.) It is applicable to only ideal gases under STP conditions

Answer 1

Hint The Equation of a state is a semi-empirical functional relationship between pressure, volume and temperature of a substance. According to Ideal gas equation, PV = nRT
Where P = Pressure
V = Volume
R = gas constant
T = Temperature

Complete step by step answer :
First, let us see what the equation of state is. The Equation of a state is a semi-empirical functional relationship between pressure, volume and temperature of a substance.
As we all know that according to the Ideal gas equation, the three states are required to completely define the state of a system. These three properties are Pressure (P), Volume (V) and Temperature (T). According to Ideal gas equation, PV = nRT
Where P = Pressure
V = Volume
R = gas constant
T = Temperature
So, the ideal gas equation is also the equation of state because the ideal gas equation is also the relationship between four variables. It also describes the state of any gas at any time.

So, the option b.) is the correct answer.

Note : It must be noted that no gas in reality follows the ideal gas equation. So, these are called real gases. These gases have deviations from an ideal gas. An ideal gas is a theoretical concept. It is for simplifying calculations. Any gas behaves similar to ideal gas under the conditions of high temperature and pressure.