Calculate the amount of heat transferred when 2.60 g of c2h2 (g) is consumed in this reaction at constant pressure

Question

Chemistry

Jacquelyn Griffith

2 August, 19:45

Calculate the amount of heat transferred when 2.60 g of c2h2 (g) is consumed in this reaction at constant pressure

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Judah Pruitt · Answer 1

Answer is: 125,55 kJ.

Chemical reaction: 2C₂H₂ (g) + 5O₂ (g) → 4CO₂ (g) + 2H₂O (g) Δ H = - 2511 kJ.

ΔH = - 2511 : 2 = - 1255,5 kJ for 1 mol.

m (C₂H₂) = 2,60 g.

n (C₂H₂) = m (C₂H₂) : M (C₂H₂).

n (C₂H₂) = 2,60 g : 26 g/mol = 0,1 mol.

Q = ΔH · n.

Q = 1255,5kJ · 0,1 mol = 125,55 kJ.