For the gas phase reaction, C2H4(g) + H2...

For the gas phase reaction, `C_2H_4(g) + H_2(g) iff C_2H_6: DeltaH = -32.7` kcal carried out in a vessel, the equilibrium concentration of `C_2H_4` can be increased by

increasing temperature

decreasing temperature

adding some `H_2`

removing some `C_2H_6`

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