At what vondition idol gas behave like real gas ?

An ideal gas behaves like a real gas under conditions of low pressure and high temperature. This is because at low pressure and high temperature, the molecules in an ideal gas are far apart and moving quickly, similar to the behavior of molecules in a real gas.

Ideal gases behave like real gases under the following conditions:

1. Low Pressure: When the pressure of the gas is low (typically below 1 atmosphere or 101.3 kPa), the gas particles are relatively far apart and their interactions with each other and with the container walls are negligible. Under these conditions, the gas behaves more like an ideal gas.

2. High Temperature: At high temperatures (typically above room temperature), the gas particles have more kinetic energy and move faster. This increased kinetic energy overcomes the intermolecular forces between the particles, making the gas behave more like an ideal gas.

3. Low Concentration: When the concentration of the gas is low, the number of gas particles per unit volume is small. This reduces the frequency of particle collisions and makes the gas behave more like an ideal gas.

In most practical applications, gases behave reasonably well as ideal gases at pressures below about 10 atmospheres and temperatures above room temperature. However, significant deviations from ideal gas behavior can occur at high pressures and/or low temperatures, particularly for gases with strong intermolecular forces (such as polar gases or gases with large molecules).