Avogadro defined one mole of carbon-12 atoms to have a mass of exactly 12.0 grams. Calculate the number of hydrogen atoms in 1 mole.
A) 1.38 x 1025 atoms
B) 1.66 x 1024 atoms
C) 3.98 x 1023 atoms
D) 6.02 x 1023 atoms

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 :

in the analysis of systems that involve fluid flow, we frequently encounter the combination of properties u and pv.