1) When H 2 (g) reacts with C 2 H 4 (g) to form C 2 H 6 (g) , 137 kJ of energy a

Question

1)WhenH2(g)reacts withC2H4(g)to formC2H6(g),137kJ of energy areevolvedfor each mole ofH2(g)that reacts.

Write a balanced thermochemical equation for the reaction with an energy term in kJ as part of the equation.

2))WhenCO(g)reacts withH2O(l)to formCO2(g)andH2(g),2.80kJ of energy areabsorbedfor each mole ofCO(g)that reacts.

Write a balanced thermochemical equation for the reaction with an energy term in kJ as part of the equation.

3))WhenCa(OH)2(aq)reacts withHCl(aq)to formCaCl2(s)andH2O(l),30.2kJ of energy areevolvedfor each mole ofCa(OH)2(aq)that reacts.

Write a balanced thermochemical equation for the reaction with an energy term in kJ as part of the equation.

Explanation / Answer

1) C2H4 (g) + H2 (g) ---------> C2H6 (g) + 137 kJ

2) CO (g) + H2O(l) + 2.8 kJ ------------> CO2 (g) + H2 (g)

3) Ca(OH)2 (aq) + 2 HCl (aq) -----------> CaCl2 (s) + 2H2O (l) + 30.2 kJ

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