Question 20 (1 point) In the lab, a student prepared a solution of ammonium chloride in water. The student
placed 9.5 g NH4Cl in a beaker and added 35.0 g of H20. The initial temperature of
the water was 27°C. The student stirred the mixture, and the final temperature of
the solution was 16°C.
12
which is called
In this solution, the substance that is being dissolved is
the
15
O H20; solvent
18
O NH4Cl; solute
NH4Cl; solvent
H20; solute

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :

its b it was a compound