2C+O2 xrightarrow2CO; Δ H=220kJ Which of the following statement is correct for this reaction?

Question

2C+O2 xrightarrow2CO; Δ H=220kJ Which of the following statement is correct for this reaction? (A) Heat of combustion of carbon is 110 kJ (B) Reaction is exothermic (C) Reaction needs no initiation (D) All of these are correct

Tardigrade Admin · Accepted Answer

2C+O2 xrightarrow2CO; Δ H=-220kJ This reaction does not represent complete combustion of carbon, hence heat of combustion of carbon will not be equal to 110 kJ. The negative sign of Δ H indicates that this reaction is exothermic. Also, despite being spontaneous reaction, it requires initiation.

Q. 2C+O2​​2CO;ΔH=220kJ Which of the following statement is correct for this reaction?

Heat of combustion of carbon is 110 kJ

Reaction is exothermic

Reaction needs no initiation

All of these are correct

2C+O2​​2CO;ΔH=−220kJ This reaction does not represent complete combustion of carbon, hence heat of combustion of carbon will not be equal to 110 kJ. The negative sign of ΔH indicates that this reaction is exothermic. Also, despite being spontaneous reaction, it requires initiation.

Q. $2 C + O_{2} 2 CO; Δ H = 220 k J$ Which of the following statement is correct for this reaction?