How much energy is released when 34.2 g of water freezes?
Amount of water = 34.2 g
Energy released when 34.2 g of water freezes = ?
Heat must be removed from the water to cause it to freeze and become ice.
The amount of heat released by freezing 1 mole of water is 6.02 kJ/mol.
Formula to calculate the heat required :
q = mHf
where, q = heat in kJ,
m = mass(in grams),
Hf = heat of fusion
We have Hf in terms of moles, but the mass is given in grams. So let’s find the number of moles for the given amount of water.
So, let’s find number of moles :
Number of moles(m) =
Molar mass of water = 18.01 g/mol
Therefore, number of moles =
= 1.89 moles.
So, number of moles in 34.2 g of water is 1.89 moles.
Textbook: Introductory Chemistry
Author: Nivaldo J Tro
Since the solution to 59P from 12 chapter was answered, more than 2134 students have viewed the full step-by-step answer. This full solution covers the following key subjects: Energy, freezes, much, released, Water. This expansive textbook survival guide covers 19 chapters, and 2045 solutions. The full step-by-step solution to problem: 59P from chapter: 12 was answered by , our top Chemistry solution expert on 05/06/17, 06:45PM. The answer to “How much energy is released when 34.2 g of water freezes?” is broken down into a number of easy to follow steps, and 11 words. This textbook survival guide was created for the textbook: Introductory Chemistry, edition: 5. Introductory Chemistry was written by and is associated to the ISBN: 9780321910295.