2. Write the balanced chemical equations of each reaction:
a. Calcium carbide (CaC2) reacts with water to form calcium hydroxide (Ca(OH)2) and acetylene gas (C2H2).
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Calcium carbide (CaC2) reacts with water to form acetylene (C2H2) gas and calcium hydroxide (Ca(OH)2). If the ΔH for:
CaC2(s) + 2H2O(l) = Ca(OH)2(s) + C2H2(g)
is -127 kJ, then what is the enthalpy of formation for calcium carbide? The ΔH of formation for H2O(l), Ca(OH)2(s) and C2H2(g) are -286, -986, 227 kJ/mol respectively. The units are kJ.
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