Answer
$Q=3.49KJ$
Work Step by Step
The energy transferred to gas as heat can be calculated from the formula:
$Q=nC_P\Delta T$
Since we know that $C_P=\frac{7}{2}R$, the above formula can be written as:
so $Q=n\frac{7}{2}R\Delta T$
Putting the values of $n,R$ and $\DeltaT$ in the formula and solving, we get:
$Q=3\times\frac{7}{2}(8.314)(40)$
$Q=3.49\times10^3J$
$Q=3.49KJ$
