Question

Valendo 29 pontos, me ajudemmm lei de hess

Answer 1

I - Inverter.
II - Conservar.

$Ca(OH)_{2} _{(s)} -\ \textgreater \ CaO_{1(s)} + H_{2} O _{(l)}$ ΔH = +65 KJ
$CaCl_{2(s)} + H_{2} O _{(l)} -\ \textgreater \ Ca(OH)_{2(s)} + C_{2} H_{2 (g)}$ ΔH = - 126KJ
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$CaCl_{2(s)} + H_{2} O _{(l)} -\ \textgreater \ C_{2} H_{2(g)} + CaO_{(s}$ ΔH = - 61KJ/mol de $CaC_{2(s)}$

ΔH = +65 - 126
ΔH = - 61KJ