When there is an extremely small amount of moisture in the air,the moist adiabatic rate of cooling would be almost equal to the dry adiabatic rate.

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The moist adiabatic rate of cooling is the rate at which a parcel of air cools as it rises and condenses moisture. This rate is slower than the dry adiabatic rate of cooling, which is the rate at which a parcel of dry air cools as it rises. However, when there is very little moisture in the air, the rate at which the air cools and the rate at which it would cool if it were dry are almost the same, meaning that the moist adiabatic rate of cooling is almost equal to the dry adiabatic rate.

When There Is an Extremely Small Amount of Moisture in the Air,the