3 attempts leftC Check my work Be sure to answer all parts. Stearic acid (CsH0))

Question

3 attempts leftC Check my work Be sure to answer all parts. Stearic acid (CsH0)) is a typical fatty acid, a molecale with a long hydrocarbon chain and an organic acid group (COOH) at the end. It is used to make cosmetics, ointments, soaps, and candles and is found in animal tissue as part of many saturated fats. In fact, when you eat meat, chances are that you are ingesting some fats that contain stearic acid. Calculate the heat (g) in kJ and kcal when 53.1 g of stearic acid is bured compltely given that AH94kJimol kJ kcal

Explanation / Answer

molar mass of steric acid = 284.48 g / mol

mass = 53.1 g

moles = mass / molar mass

          = 53.1 / 284.48

          = 0.187

Q = - delta H x moles

    = 948 kJ / mol x 0.187 mol

    = 177 kJ

Q = 177 kJ ----------->answer

1 cal = 4.184 J

Q = 177 / 4.184 =42.3 kcal

Q = 42.3 kcal --------> answer

Related Questions

Navigate

• Browse (All)
• Browse 3
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.