NEET • Chemistry

Gaseous State

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Temperature Scale and Basic Gas Laws

The Gaseous State chapter begins with temperature conversion and three empirical laws.

TopicFormula

Temperature scale

C−0100−0=K−273373−273=F−32212−32=R−R(O)R(100)−R(O)\frac{C-0}{100-0}=\frac{K-273}{373-273}=\frac{F-32}{212-32}=\frac{R-R(O)}{R(100)-R(O)}

Boyle's law

V∝1PV\propto\frac{1}{P} at constant temperature; P1V1=P2V2P_1V_1=P_2V_2

Charles' law

V∝TV\propto T at constant pressure; V1T1=V2T2\frac{V_1}{T_1}=\frac{V_2}{T_2}

Gay-Lussac's law

P∝TP\propto T at constant volume; P1T1=P2T2\frac{P_1}{T_1}=\frac{P_2}{T_2}

Boyle
PV0
Charles
TV0
Gay-Lussac
TP0

Variables & Notation

PP

pressure

VV

volume

TT

absolute temperature

Notes

  • RR in the temperature-scale formula is the reading on an unknown scale.