Carbon and carbon monoxide bum in oxygen to form carbon dioxide according to the following reactions C+O2 arrow CO2; Δ H=-394 kJ mol-1 2CO+O2arrow 2CO2; Δ H=-569 kJ mol-1 The heat of formation of 1 mole of monoxide is, thus

Question

Carbon and carbon monoxide bum in oxygen to form carbon dioxide according to the following reactions C+O2 arrow CO2; Δ H=-394 kJ mol-1 2CO+O2arrow 2CO2; Δ H=-569 kJ mol-1 The heat of formation of 1 mole of monoxide is, thus (A) -219.0 kJ mol-1 (B) -109.5 kJ mol-1 (C) -175.0 kJ mol-1 (D) -87.5 kJ mol-1

Tardigrade Admin · Accepted Answer

Given, reactions are C + O 2 arrow CO 2 ; Δ H=-394 J / mol ...(i) 2 CO + O 2 arrow 2 CO 2 ; Δ H =-569 kJ / mol...(ii) We obtained reaction C+(1/2) O2 arrow C O; Δ H= ? Divide Eq. (ii) by 2 , take its reciprocal and add the obtained equation in Eq. (i) CO 2 arrow CO +(1/2) O 2, Δ H =+284.5 kJ / mol ( C + O 2 arrow CO 2,Δ H =-394 kJ / mol / C +(1)2 O 2 arrow CO , Δ H =-109.5 JJ / mol ) Δ H( CO )=-109.5 kJ / mol

Q. Carbon and carbon monoxide bum in oxygen to form carbon dioxide according to the following reactions $C + O_{2} \to C O_{2};$ $Δ H = - 394 k J m o l^{- 1}$ $2 CO + O_{2} \to 2 C O_{2};$ $Δ H = - 569 k J m o l^{- 1}$
The heat of formation of $1 m o l e$ of monoxide is, thus

$- 219.0 k J m o l^{- 1}$

$- 109.5 k J m o l^{- 1}$

$- 175.0 k J m o l^{- 1}$

$- 87.5 k J m o l^{- 1}$

Q. Carbon and carbon monoxide bum in oxygen to form carbon dioxide according to the following reactions C+O2​→CO2​; ΔH=−394kJmol−1 2CO+O2​→2CO2​; ΔH=−569kJmol−1 The heat of formation of 1mole of monoxide is, thus

−219.0kJmol−1

−109.5kJmol−1

−175.0kJmol−1

−87.5kJmol−1

Q. Carbon and carbon monoxide bum in oxygen to form carbon dioxide according to the following reactions $C + O_{2} \to C O_{2};$ $Δ H = - 394 k J m o l^{- 1}$ $2 CO + O_{2} \to 2 C O_{2};$ $Δ H = - 569 k J m o l^{- 1}$
The heat of formation of $1 m o l e$ of monoxide is, thus

$- 219.0 k J m o l^{- 1}$

$- 109.5 k J m o l^{- 1}$

$- 175.0 k J m o l^{- 1}$

$- 87.5 k J m o l^{- 1}$