Find the heat absorbed from the surroundings when 15 g of O₂ reacts according to the equation O + O₂ $\rarr$ O₃, $\Delta$H^$\circ$_rxn= -103 kJ/mol. A) 4.6 * 10^-3 kJ B) 32 kJ C) 48 kJ D) 96 kJ E) 110 kJ

Question

Quizplus · Accepted Answer

The molar mass of O2 is 32 g/mol. For 15 g of O2, the moles are 15 g / 32 g/mol = 0.46875 mol. The reaction releases 103 kJ/mol, so the heat absorbed is 0.46875 mol * 103 kJ/mol = 48.28125 kJ, approximately 48 kJ.

Find the Heat Absorbed from the Surroundings When 15 G →\rarr→

Find the Heat Absorbed from the Surroundings When 15 G $\rarr$