Which is NOT an assumption of the kinetic-molecular theory? Multiple choice question.

A)
A gas particle is not significantly attracted or repelled by other gas particles.

B)
Collisions between gas particles are elastic.

C)
All gases at a given temperature have the same average kinetic energy.

D)
All the gas particles in a sample have the same velocity.

3; average kinetic energy is just a fancy way of saying temperature. The average kinetic energy of a gas has nothing to do with the molar amount.

The equation that we will use to solve this problem is :
PV = nRT where:
P is the pressure of gas = 1.8 atm
V is the volume of gas = 18.2 liters
n is the number of moles of gas = 1.2 moles
R is the gas constant =  0.0821
T is the temperature required (calculated in kelvin)

Using these values to substitute in the equation, we find that:
(1.8)(18.2) = (1.2)(0.0821)(T)
T = 332.5 degree kelvin

The last step is to convert the degree kelvin into degree celcius:
T = 332.5 - 273 = 59.5 degree celcius