Problem: Consider the following reaction: 2 Mg(s) + O2(g) → 2MgO(s)        ΔH = -1204 kJIs this reaction exothermic or endothermic? Calculate the amount of heat transferred when 3.55 g of Mg(s) reacts at constant pressure. 

FREE Expert Solution

We are asked to calculate the amount of heat transferred when 3.55 g of Mg(s) reacts at constant pressure and to determine if the reaction is exothermic or endothermic.


The given thermochemical equation is:

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


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Problem Details

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

Is this reaction exothermic or endothermic? 

Calculate the amount of heat transferred when 3.55 g of Mg(s) reacts at constant pressure. 

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