A monatomic ideal gas in a rigid container is heated from 206 K to 335 K by adding 8280 J of heat. How many moles of gas are there in the container?

5.14 moles

Explanation:

heat supplied:  8280 J

The formula used for heat absorbed by an ideal gas:

where,

q = heat absorbed = 8280 J

= for monoatomic gas =

n = number of moles

R = gas constant = 8.314 J/Kmol

= initial temperature = 206 K

= final temperature  = 335 K

Now put all the given values in the above formula,

Thus there are 5.14 moles of gas in the container.