Answer to Question #251481 in General Chemistry for Mallorie

Question

Calculate the standard enthalpy of formation of gaseous carbon dioxide (CO2) using the following thermochemical information:

2 Ca(s) + O2(g) <- -> 2 CaO(s) TriangleH=-1270.2 kJ

CaO(s) + CO2(g) <- -> CaCO3(s) TriangleH=-178.3 kJ

2 C(s) + 2 Ca(s) + 3 O2(g) <- -> 2 CaCO3(s) TriangleH=-2413.8 kJ

1) TriangleH= ____ kJ

Answer 1

-1270.2+-178.3--2413.8

= 965.3kJ