Consider the following balanced thermochemical equation for the decomposition of the mineral magnesite: MGCO3(s)Mg0(s) + CO2(g) AH = 117.3 kJ (a) Is heat absorbed or released in the reaction? released absorbed (b) What is AH for the reverse reaction? kJ (c) What is AH when 5.30 mol of CO, reacts with excess MgO? kJ (d) What is AH when 40.5 g of CO, reacts with excess MgO? kJ

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