Question

The value of $(y - x)kJmol^{- 1}$ for the following reaction at $C_{2}H_{2} + 2H_{2} \rightarrow C_{2}H_{6};\Delta E = - 314.0kJ$ will be $C + O_{2} \rightarrow CO_{2};\Delta E = - 393.5kJ$.

• A. $N_{2} + O_{2} \rightarrow 2NO;\Delta E - 180.5kJ$
• B. $2H_{2} + O_{2} \rightarrow 2H_{2}O;\Delta E + 571.8kJ$
• C. $A \rightarrow B$
• D. $2C(s) + 2O_{2}(g) \rightarrow 2CO_{2}(g);\Delta H = - 787kJ$

Answer 1

Answer: (D)

$2C(s) + 2O_{2}(g) \rightarrow 2CO_{2}(g);\Delta H = - 787kJ$

Answer 2

$375K$

also, $273K$

$102^{o}C$.