A 120L kiln is used for vitrifying ceramics It is currently

A 120L kiln is used for vitrifying ceramics. It is currently operating at 1275?C , and the pressure is 1.100atm . How many moles of air molecules are within the confines of the kiln

A 10.0L gas cylinder has been filled with 5.00moles of gas. You measure the pressure to be 5.00atm . What is the temperature inside the tank?

thank you

Solution

a) Using ideal gas equation,

PV = nRT

P = 1.100 atm

V = 120 L

R = 0.0821

Temp = 1275C = 273+1275 = 1548 K

substituting the values

1.100 * 120 = n * 0.0821 * 1548

n = 1.038 moles

b) Using ideal gas equation,

PV = nRT

V = 10 L

n = 5 moles

R = 0.0821

P = 5 atm

substituting the values

5* 10 = 5 * 0.0821 * T

T = 121.802 K = -151.19 C