Which of the following expressions is correct to calculate enthalpy of a reaction?

Question

Which of the following expressions is correct to calculate enthalpy of a reaction? (A) Δ Hreaction = Sigma ΔfHreactants - Sigma ΔfHproducts (B) Δ Hreaction = Sigma B.E.products - Sigma B.E.reactants  (C) Δ Hreaction = Sigma B.E.reactants - Sigma B.E.products  (D) Δ Hreaction = Δ H1 × Δ H2 × Δ H3 ldots

Tardigrade Admin · Accepted Answer

Enthalpy change for a reaction expressions:
1.

Δ H_{reaction} = Σ \cdot B \cdot E_{reactant} - Σ \cdot B \cdot E_{product}

2.

Δ H_{reaction} = \sum Δ H_{products} - \sum Δ H_{reactants}

3.

Δ H_{reaction} = Δ H_{1} + Δ H_{2} + Δ H_{3} + \dots

Q. Which of the following expressions is correct to calculate enthalpy of a reaction?

$Δ H_{re a c t i o n} = Σ Δ_{f} H_{re a c t an t s} - Σ Δ_{f} H_{p ro d u c t s}$

$Δ H_{re a c t i o n} = Σ B . E ._{p ro d u c t s} - Σ B . E ._{re a c t an t s}$

$Δ H_{re a c t i o n} = Σ B . E ._{re a c t an t s} - Σ B . E ._{p ro d u c t s}$

$Δ H_{re a c t i o n} = Δ H_{1} \times Δ H_{2} \times Δ H_{3} \dots$

Enthalpy change for a reaction expressions:
1. $Δ H_{reaction} = Σ \cdot B \cdot E_{reactant} - Σ \cdot B \cdot E_{product}$
2. $Δ H_{reaction} = \sum Δ H_{products} - \sum Δ H_{reactants}$
3. $Δ H_{reaction} = Δ H_{1} + Δ H_{2} + Δ H_{3} + \dots$

Q. Which of the following expressions is correct to calculate enthalpy of a reaction?

ΔHreaction​=ΣΔf​Hreactants​−ΣΔf​Hproducts​

ΔHreaction​=ΣB.E.products​−ΣB.E.reactants​

ΔHreaction​=ΣB.E.reactants​−ΣB.E.products​

ΔHreaction​=ΔH1​×ΔH2​×ΔH3​…

Enthalpy change for a reaction expressions: 1. ΔHreaction ​=Σ⋅B⋅Ereactant ​−Σ⋅B⋅Eproduct ​ 2. ΔHreaction ​=∑ΔHproducts ​−∑ΔHreactants ​ 3. ΔHreaction ​=ΔH1​+ΔH2​+ΔH3​+…

$Δ H_{re a c t i o n} = Σ Δ_{f} H_{re a c t an t s} - Σ Δ_{f} H_{p ro d u c t s}$

$Δ H_{re a c t i o n} = Σ B . E ._{p ro d u c t s} - Σ B . E ._{re a c t an t s}$

$Δ H_{re a c t i o n} = Σ B . E ._{re a c t an t s} - Σ B . E ._{p ro d u c t s}$

$Δ H_{re a c t i o n} = Δ H_{1} \times Δ H_{2} \times Δ H_{3} \dots$

Enthalpy change for a reaction expressions:
1. $Δ H_{reaction} = Σ \cdot B \cdot E_{reactant} - Σ \cdot B \cdot E_{product}$
2. $Δ H_{reaction} = \sum Δ H_{products} - \sum Δ H_{reactants}$
3. $Δ H_{reaction} = Δ H_{1} + Δ H_{2} + Δ H_{3} + \dots$