Using the data in the appendix of text, calculate the standard enthalpy change for each of...

Using the data in the appendix of text, calculate the standard enthalpy change for each of the following reactions:

(A) Si(s) + 2F₂(g) ⟶ SiF₄(g)

(B) 2C(s) + 2H₂(g) + O₂(g) ⟶ CH₃CO₂H(l)

(D) CS₂(g) + 3Cl₂(g) ⟶ CCl₄(g) + S₂Cl₂(g)

Solutions

Expert Solution

(A) Si(s) + 2F₂(g) ⟶ SiF₄(g)

H⁰ rex = H⁰f products - H⁰ f reactant

= -1614.9Kj -(0 +0) = -1614.9KJ

(B) 2C(s) + 2H₂(g) + O₂(g) ⟶ CH₃CO₂H(l)

H⁰ rex = H⁰f products - H⁰ f reactant

= -484.1-(0 +0 +0 ) = -484.1KJ

H⁰ rex = H⁰f products - H⁰ f reactant

= -46.1+135.1 -(-74.9 + 0)

= 163.9KJ

(D) CS₂(g) + 3Cl₂(g) ⟶ CCl₄(g) + S₂Cl₂(g)

H⁰ rex = H⁰f products - H⁰ f reactant

= -19.5-100.4-(117.2+0)

= -237.1Kj/mole

queen_honey_blossom answered 1 year ago

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