How many calories are required to heat 40 gram of argon from 40 to`100^(@)C` at constant volume ?( `R= 2 cal // molK)`A. 120B. 2400C. 1200D. 180

How many calories are required to heat 40 gram of argon from 40 to`100

1.	How many calories are required to heat 40 gram of argon from 40 to`100^(@)C` at constant volume ?( `R= 2 cal // molK)`A. 120B. 2400C. 1200D. 180
Answer» Correct Answer - D For a monoatomic gas like argon, `C_(v) = 3cal mol^(-1), C_(p) = 5 cal mol^(-1)`. Molar heat capacity is the heat required to raise the temperature of 1 mole of the gas by `1^(@)C `. 40 g of argon `=` 1 mole. Hence,heat required to raiseto raise the temperature from `40^(@)` to `100^(@)C` at constant volume `= 3 xx ( 100 - 40) = 180 cal`

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How many calories are required to heat 40 gram of argon from 40 to`100^(@)C` at constant volume ?( `R= 2 cal // molK)`A. 120B. 2400C. 1200D. 180

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