The standard heat of combustion of solid Boron is equal to :-

Question

The standard heat of combustion of solid Boron is equal to :- (A) Δ H f o ( B 2 O 3) (B) 2 Δ H f o ( B 2 O 3) (C) (1/2) Δ H f o ( B 2 O 3) (D) 4 Δ H f o ( B 2 O 3)

Tardigrade Admin · Accepted Answer

B +(3/2) O 2 arrow (1/2) B 2 O 3 Δ H =(Δ H comb ) B o (1/2)(Δ H f o ) B 2 O 3

Q. The standard heat of combustion of solid Boron is equal to :-

$Δ H_{f}^{o} (B_{2} O_{3})$

$2Δ H_{f}^{o} (B_{2} O_{3})$

$\frac{1}{2} Δ H_{f}^{o} (B_{2} O_{3})$

$4Δ H_{f}^{o} (B_{2} O_{3})$

$B + \frac{3}{2} O_{2} \to \frac{1}{2} B_{2} O_{3}$
$Δ H = (Δ H_{co mb})_{B}^{o}$
$\frac{1}{2} (Δ H_{f}^{o})_{B_{2} O_{3}}$

Q. The standard heat of combustion of solid Boron is equal to :-

ΔHfo​(B2​O3​)

2ΔHfo​(B2​O3​)

21​ΔHfo​(B2​O3​)

4ΔHfo​(B2​O3​)

B+23​O2​→21​B2​O3​ ΔH=(ΔHcomb​)Bo​ 21​(ΔHfo​)B2​O3​​

$Δ H_{f}^{o} (B_{2} O_{3})$

$2Δ H_{f}^{o} (B_{2} O_{3})$

$\frac{1}{2} Δ H_{f}^{o} (B_{2} O_{3})$

$4Δ H_{f}^{o} (B_{2} O_{3})$

$B + \frac{3}{2} O_{2} \to \frac{1}{2} B_{2} O_{3}$
$Δ H = (Δ H_{co mb})_{B}^{o}$
$\frac{1}{2} (Δ H_{f}^{o})_{B_{2} O_{3}}$