Question

a certain chemical reaction releases 34.5 kj/g of heat for each gram of reactant consumed. how can you calculate what mass of reactant will produce 1780. j of heat? set the math up. but dont do any of it. just leave your answer as a math expression. also, be sure your answer includes all the correct unit symbols. mass =

Explanation:

Step1: Convert heat units

First, convert 1780. J to kJ. Since \( 1\space kJ = 1000\space J \), we have \( 1780.\space J=\frac{1780.}{1000}\space kJ \).

Step2: Relate heat and mass

We know that heat released per gram is \( 34.5\space kJ/g \). The formula for mass (\( m \)) is \( m=\frac{\text{Total Heat}}{\text{Heat per gram}} \). Substituting the values, the mass expression is \( \frac{\frac{1780.}{1000}\space kJ}{34.5\space kJ/g} \).

Answer:

\(\frac{\frac{1780.}{1000}\space kJ}{34.5\space kJ/g}\)