Enthalpy of Formation Video Lessons

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Problem: How many grams of Fe2O3(molar mass = 159.7 g/mole) are produced from the absorption of 4.85 x 103 J of heat according to the following balanced thermochemical equation?4 Fe(s) + 3 O2(g) → 2 Fe2O3(s)           ΔH = + 65.2 kJA. 11.9 gB. 14.9 gC. 23.8 gD. 1.19 x 104g

FREE Expert Solution

We are going to do the following steps:

Step 1: Calculate the moles of Fe

Step 2: Calculate the mass of Fe2O3


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Problem Details

How many grams of Fe2O3(molar mass = 159.7 g/mole) are produced from the absorption of 4.85 x 103 J of heat according to the following balanced thermochemical equation?

4 Fe(s) + 3 O2(g) → 2 Fe2O3(s)           ΔH = + 65.2 kJ

A. 11.9 g

B. 14.9 g

C. 23.8 g

D. 1.19 x 104g

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