Question

Formulas for combined effect of pressure and temperatures on a spherical shell

Answer 1

For a fixed amount of gas, Boyle's Law and Charles' Lawcan be combined into one equation which is known as the combined gas equation:

PV
T= k (a constant)OR


P1V1
T1 = P2V2
T2

where

P1 = initial pressure

V1 = initial volume

T1 = initial temperature (K)

 and

P2 = final pressure

V2 = final volume

T2 = final temperature (K)

Note that:

(i) Pressure can be in any units BUT the units for P1 and P2MUST be the same. 
For example, both are in kPa or both in atm.

(ii) Volume can be in any units BUT the units for V1 and V2MUST be the same. 
For example, both in mL or both in L

(iii) Temperature MUST be in Kelvin (NOT celsius, NOT fahrenheit)

A gas that obeys the combined gas equation (that is one that obeys Boyle's Law and Charles' Law) is known as an Ideal Gas.