Answer
$Q = 700J$
Work Step by Step
From the T-S diagram, the area under the graph indicates the energy transfer as heat, $Q = \int T dS$. The heat transfer in process $1 \rightarrow 2$ is the area of rectangle,
$Q = (350K)(8J/K - 6 J/K) $
$Q = (350K)(2.0J/K)$
$Q = 700J$
