Which of the following equilibria will shift to the left when the temperature is increased? [∆H (kl/mol) values are given in parentheses.] (Select all that apply.)
(a) S + H2 ⇆H2S ΔH(-20)
(b) C + H2O 5⇆CO + H2 ΔH (131)
(c) H2+ CO2⇆ H2O + CO ∆H(41)
(d) MgO + CO2 ⇆ MgCO3 ΔH (−117)
(e) 2CO + O2 = 2CO2 ΔH (−566)
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