Consider the following intermediate chemical equations.

what is the enthalpy of the overall chemical reaction?
-999 kj
-250. kj
250. kj
999 kj

999 kJ

Explanation:

Given are two reactions with enthalpies Δ and Δ

We know enthalpy is an additive property.

Thus the overall chemical equation can be obtained from adding both the two elementary equations.

Therefore the overall enthalpy is the summation of enthalphy change in each equation.

ΔΔΔ

Δ

Therefore the overall enthalpy is 999 kJ.

in chemistry, a solution’s concentration is how much of a dissolvable substance, known as a solute, is mixed with another substance, called the solvent. the standard formula is c = m/v, where c is the concentration, m is the mass of the solute dissolved, and v is the total volume

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