The reaction of hydrogen chloride with ammonia forms ammonium chloride and releases 42. kcal of energy.
kcal
mol
HCl(g) + NH3 (g) -+ NH4Cl (g)
How much energy is released when 3.5 mol of HCl reacts? Be sure your answer has the correct number of significant figures.
ΔΗ =- 42.
kcal of energy released
To find the amount of energy released when 3.5 mol of HCl reacts, we need to use the given energy release per reaction and calculate it for the given number of moles.
Given: ΔH = -42. kcal
First, establish the molar ratio between HCl and energy release:
1 mol HCl produces -42. kcal of energy
Now, use this ratio to calculate the energy release for 3.5 mol of HCl:
3.5 mol HCl * (-42. kcal/mol) = -147. kcal
Therefore, when 3.5 mol of HCl reacts with ammonia to form ammonium chloride, 147 kcal of energy is released. Be sure to consider significant figures in the final answer.