Question

define the following and write their units a)pressure b) amount of gas c) temperature d) volume​

Answer 1

Answer: Pressure (P), Amount of gas (n), Temperature (T) and Volume (V). Their definitions and units are given below :

Explanation:

(a) Pressure is a physical quantity which measures the force which is acting perpendicular to the surface of an object. It is measured in Pascal or $Nm^{-2}$ or atm.

(b) Amount of gas is the number of moles of gas present. It is measured in moles.      

(c) Temperature is a physical quantity which measures the degree of hotness and coldness of an object. It is measured in °C or °F or K.

(d) Volume is a quantity which expresses the amount of three-dimensional space occupied by a solid surface. It is measured in $m^{3}$ or $cm^{3}$ .

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Answer 2

Answer: Pressure (P), Amount of gas (n), Temperature (T) and Volume (V). Their definitions and units are given below :

Explanation:

(a)  Pressure - Pressure is a physical quantity which measures the force which is acting perpendicular to the surface of an object. It is measured in Pascal or atm.

(b) Amount of gas is the number of moles of gas present. It is measured in moles. They are governed by certain gaseous laws such as Boyle Law, Charles Law.    

(c) Temperature is a physical quantity which measures the degree of hotness and coldness of an object. It is measured in °C or °F or K.

(d) Volume is a quantity which expresses the amount of three-dimensional space occupied by a solid surface. It is measured in ml or litre. .

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