Ammonium chloride is produced in the thermochemical equation NH3 (g) + HCl (g) → NH4Cl (s) ΔH = –176 kJ. How many moles of NH4Cl have been produced if the change in enthalpy is –528 kJ? You may use a calculator.

3.00 mol NH₄Cl

Explanation:

Step 1: Write the thermochemical equation for the production of ammonuim chloride

NH₃(g) + HCl(g) → NH₄Cl(s)    ΔH = –176 kJ

Step 2: Calculate the number of moles of NH₄Cl produced if the change in enthalpy is –528 kJ

According to the balanced thermochemical equation, 176 kJ are released when 1 mole of NH₄Cl is produced. The moles of NH₄Cl produced if the change in enthalpy is –528 kJ is:

-528 kJ × 1 mol NH₄Cl/(–176 kJ) = 3.00 mol NH₄Cl

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.