For the reaction C 2 H 5 OH ( l )+3 O 2( g ) longrightarrow 2 CO 2( g )+3 H 2 O ( l ) which one is true:

Question

For the reaction C 2 H 5 OH ( l )+3 O 2( g ) longrightarrow 2 CO 2( g )+3 H 2 O ( l ) which one is true: (A) Δ H =Δ E - RT (B) Δ H =Δ E + RT (C) Δ H =Δ E +2 RT (D) Δ H =Δ E -2 RT

Tardigrade Admin · Accepted Answer

We know that Δ H=Δ E+Δ nRT where Δ n = number of moles of gaseous product - number of moles of gaseous reactant = 2 - 3 = - 1 So, Δ H=Δ E-RT

Q. For the reaction $C_{2} H_{5} O H (l) + 3 O_{2} (g) ⟶ 2 C O_{2} (g) + 3 H_{2} O (l)$ which one is true:

$Δ H = Δ E - RT$

$Δ H = Δ E + RT$

$Δ H = Δ E + 2 RT$

$Δ H = Δ E - 2 RT$

We know that $Δ H = Δ E + Δ n RT$
where $Δ n$ = number of moles of gaseous product - number of moles of gaseous reactant
$= 2 - 3 = - 1$
So, $Δ H = Δ E - RT$

Q. For the reaction C2​H5​OH(l)+3O2​(g)⟶2CO2​(g)+3H2​O(l) which one is true:

ΔH=ΔE−RT

ΔH=ΔE+RT

ΔH=ΔE+2RT

ΔH=ΔE−2RT