Calculate the enthalpy for the reaction 3c +o2 = c3o2
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3C + O2 ----------------> C3O2 H = ?
eq 2x2 2C + O2 ---------------> 2CO H = -221.0
add eq1 2CO + C ------------->C3O2 H = 127.3
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3C + O2 ------------------> C3O2 ; H= -93.7
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