# Problem: Consider the following reaction: 2Mg(s) + O2(g) → 2MgO(s)        ΔH = -1204 kJHow many grams of MgO are produced during an enthalpy change of -238 kJ? How many kilojoules of heat are absorbed when 40.5 g of MgO(s) is decomposed into Mg(s) and O2(g) at constant pressure?

###### FREE Expert Solution

The given thermochemical equation is:

2 Mg(s) + O2(g) → 2 MgO(s)        ΔH = –1204 kJ

Part A. We are asked to determine the mass in grams of MgO that are produced during an enthalpy change of -238 kJ.

79% (219 ratings) ###### Problem Details

Consider the following reaction: 2Mg(s) + O2(g) → 2MgO(s)        ΔH = -1204 kJ

How many grams of MgO are produced during an enthalpy change of -238 kJ?

How many kilojoules of heat are absorbed when 40.5 g of MgO(s) is decomposed into Mg(s) and O2(g) at constant pressure?

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