Calculate Δ H in kJ for the following reaction C (g)+ O 2(g) longrightarrow CO 2(g) Given that, H 2 O (g)+ C (g) longrightarrow CO (g)+ H 2(g);Δ H=+131 kJ CO (g)+(1/2) O 2(g) longrightarrow CO 2(g);Δ H=-282 kJ H 2(g)+(1/2) O 2(g) longrightarrow H 2 O (g);Δ H=-242 kJ

Question

Calculate Δ H in kJ for the following reaction C (g)+ O 2(g) longrightarrow CO 2(g) Given that, H 2 O (g)+ C (g) longrightarrow CO (g)+ H 2(g);Δ H=+131 kJ CO (g)+(1/2) O 2(g) longrightarrow CO 2(g);Δ H=-282 kJ H 2(g)+(1/2) O 2(g) longrightarrow H 2 O (g);Δ H=-242 kJ (A) -393 (B) +393 (C) +655 (D) -655

Tardigrade Admin · Accepted Answer

Given, H 2 O (g)+ C (g) longrightarrow CO (g)+ H 2(g);Δ H=131 kJ ldots (i) CO (g)+(1/2) O 2(g) longrightarrow CO 2(g) ;Δ H=-282 kJ ldots (ii) H 2(g)+(1/2) O 2(g) longrightarrow H 2 O (g) ; Δ H=-242 kJ ldots (iii) C (g)+ O 2(g) longrightarrow CO 2(g) ; Δ H=? ldots( iv ) On adding Eqs (i), (ii) and (iii), we get Eq (iv) H 2 O (g)+ C (g) longrightarrow CO (g)+ H 2(g) ; Δ H=+131 kJ CO (g)+(1/2) O 2(g) longrightarrow CO 2(g); Δ H =-282 kJ H 2(g)+(1/2) O 2(g) longrightarrow H 2 O (g);Δ H=-242 kJ C (g)+ O 2(g) longrightarrow CO 2(g) Δ H =(131-282-242) kJ =-393 kJ

Q. Calculate ΔH in kJ for the following reaction C(g)+O2​(g)⟶CO2​(g) Given that, H2​O(g)+C(g)⟶CO(g)+H2​(g);ΔH=+131kJ CO(g)+21​O2​(g)⟶CO2​(g);ΔH=−282kJ H2​(g)+21​O2​(g)⟶H2​O(g);ΔH=−242kJ

-393

+393

+655

-655