4.0 moles of argon gas is contained in a cylinder at 300k.How much heat must be added to raise its temperature to 600K at constant volume?

To calculate the heat required to raise the temperature of the argon gas from 300K to 600K at constant volume, we can use the formula:

Q = n*Cv*ΔT

Where:
Q = heat added
n = number of moles of gas (4.0 moles)
Cv = molar specific heat at constant volume for argon gas (12.5 J/mol*K)
ΔT = change in temperature (600K - 300K = 300K)

Plugging in the values:

Q = 4.0 moles * 12.5 J/mol*K * 300K
Q = 1500 J

Therefore, 1500 Joules of heat must be added to raise the temperature of 4.0 moles of argon gas from 300K to 600K at constant volume.