Consider the decomposition of liquid benzene, C6H6(l), to gaseous acetylene, C2H2(g):
C6H6 ( l ) → 3 C2H2 ( g )H = + 630 kJ
If C6H6 (g) were consumed instead of C6H6(l), would you expect the magnitude of ΔH to increase, decrease, or stay the same? Explain.
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