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A hypothetical reaction , A → 2B, proceeds through following sequence of steps - A → C; ΔH = q₁ C → D; ΔH = q₂ 1/2 D → B; ΔH = q₃ The heat of reaction is :
A
q₁ − q₂ + 2q₃
B
q₁ + q₂ − 2q₃
C
q₁ + q₂ + 2q₃
D
q₁ + 2q₂ − 2q₃
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In a change from state A to state B -

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