A nuclear fusion reaction is given by
`._(1)H^(2)+._(1)H^(2)rarr._(1)He^(3)+._(0)^(1)n + Q ("energy")`.
If `2` moles of deuterium are fused, then total released energy is

Explanation

To solve the problem of finding the total energy released when 2 moles of deuterium are fused in the given nuclear fusion reaction, we will follow these steps:

### Step 1: Understand the Reaction
The nuclear fusion reaction is:
\[ _{1}^{2}H + _{1}^{2}H \rightarrow _{2}^{3}He + _{0}^{1}n + Q \]
Here, deuterium (\( _{1}^{2}H \)) fuses to produce helium-3 (\( _{2}^{3}He \)) and a neutron (\( _{0}^{1}n \)), along with the release of energy \( Q \).

### Step 2: Calculate the Change in Mass (\( \Delta M \))
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