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
+
3H2
→
CH3OH
+
H2O
|
=ΔH−131.kJ
|
In the second step, methanol reacts to form dimethyl ether and water:
|
2CH3OH
→
CH3OCH3
+
H2O
|
=ΔH8.kJ
|
Calculate the net change in enthalpy for the formation of one mole of dimethyl ether from carbon dioxide and hydrogen from these reactions.
Round your answer to the nearest kJ
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