Question

What is the mole of magnesium, ?️H per mol of MgO, ?️H per 1 mole Mg?

Part 2: Hydrochloric Acid + Magnesium The strategy for these calculations are similar to those in Part 1. In Part 2, magnesium reagent. Calculations Sheet Thermochemistry 2 II. In Part 2, magnesium is the limiting Volume of hydrochloric acid solution Density of hydrochloric acid solution 75.0 mL Mass of hydrochloric acid solution (d-m/V) Specific heat capacity of hydrochloric acid solution Change in temperature for reaction AH-MAT) - 1.02 g ml." demo 76.5 Midxu son & l.orgn6 = 76.50 4.68 J.Ch 7.84 °C -2806 86 0.1 332 3 mol Mass of magnesium Moles of magnesium AH per mole of MgO - moles Mg J. mol AH per 1 mole Mg (1 kJ - 1000) _kJ mol' * Use the mass and atomic mass of Mg **The amount of heat we measured is, according to the equation below. per 1 mol of Mg Mg(s) + 2HCl(aq) — MgCl(aq) + H2(g)

Answer 1

Moles of magnesium = (mass/atomic mass)

[ Atomic mass of Mg = 24 g/mol]

= (0.1332/24)

= 0.00555.

$\Delta H$ per mole of MgO = ($\Delta H$​​​​​​/mole Mg) = ( - 2806.88/0.00555)

= - 505744 J/ mole^-1.

$\Delta H$ per mole of Mg = -505744 (Jmol^-1) ×

1KJ 1000J

= - 505.74 KJ mol^-1.