Skip to main content
Ch.21 - Organic Chemistry
Chapter 21, Problem 95

What is the minimum amount of hydrogen gas, in grams, required to completely hydrogenate 15.5 kg of 2-butene?

Verified step by step guidance
1
Identify the chemical reaction involved: The hydrogenation of 2-butene (C4H8) involves adding hydrogen (H2) to convert it into butane (C4H10). The balanced chemical equation is: C4H8 + H2 -> C4H10.
Calculate the molar mass of 2-butene (C4H8) and hydrogen gas (H2). Use the atomic masses: C = 12.01 g/mol and H = 1.008 g/mol.
Determine the number of moles of 2-butene in 15.5 kg. Convert the mass from kilograms to grams, then use the molar mass of 2-butene to find the moles.
Use the stoichiometry of the balanced equation to find the moles of hydrogen gas needed. According to the equation, 1 mole of C4H8 reacts with 1 mole of H2.
Convert the moles of hydrogen gas to grams using the molar mass of H2. This will give you the minimum amount of hydrogen gas required.