Dimethyl ether, a useful organic solvent, is prepared in two steps. In the first step, carbon dioxide and hydrogen react to form methanol and water:
CO2(g) + 3H2(g) = 3H3OH(l) + H20(l) Change in H = -131. kJ
In the second step, methanol reacts to form dimethyl ether and water:
2CH30H(l) = CH3OCH3(g) + H2O(l) Change in H = 8. kJ
Calculate the net change in enthalpy for the formation of one mole of dimethyl ether from carbon dioxide and hydrogen.
Round your answer to the nearest kJ.
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