Consider the following balanced thermochemical equation for the decomposition of the mineral magnesite. MgCO3(s) ? MgO(s) + CO2(g) ?Hrxn = 117.3 kJ
(a) Is heat absorbed or released in the reaction? released absorbed
(b) What is ?H for the reverse reaction? kJ________
(c) What is ?H when 5.36 mol CO2 reacts with excess MgO? kJ_____________
(d) What is ?Hrxn when 34.5 g CO2 reacts with excess MgO? kJ_______________