Physics · JEE | THERMODYNAMICS

For a chemical reaction represented as Reactants \( \rightarrow \) Products, the reaction enthalpy \( \Delta_r H \) is expressed in terms of stoichiometric coefficients \( a_i \) and \( b_i \) as:

1. A
   \( \Delta_r H = \sum_i b_i H_m(\text{products}) - \sum_i a_i H_m(\text{reactants}) \)
2. B
   \( \Delta_r H = \sum_i H_m(\text{products}) + \sum_i H_m(\text{reactants}) \)
3. C
   \( \Delta_r H = \sum_i a_i H_m(\text{products}) - \sum_i b_i H_m(\text{reactants}) \)
4. D
   \( \Delta_r H = \sum_i b_i H_m(\text{reactants}) - \sum_i a_i H_m(\text{products}) \)