Question

explain the line-(pressure is accompanied by release of energy).​

Answer 1

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Explanation: Enthalpy of a reaction is defined as the heat energy change ( Δ H ΔH ΔH ) that takes place when reactants go to products. If heat is absorbed during the reaction, Δ H ΔH ΔH is positive; if heat is released, then Δ H ΔH ΔH is negative.