Question

sch4u -- unit d -- unit test part 1
question 1 (1 point)
use the following information to answer the next question.
the thermochemical equation for the formation of
methyl alcohol indicates that 239 kj of energy is released
and 32 g of methyl alcohol is formed.
the formation of 64 g of methyl alcohol will release energy equivalent to
239 kj
478 kj
1529.6 kj
956 kj
119.5 kj

Explanation:

Step1: Analyze the relationship between mass and energy

Since energy release is proportional to the mass of methyl alcohol formed.

Step2: Calculate the energy for 64g

Given 32g releases 239kJ. Then for 64g (which is \( \frac{64}{32} = 2\) times 32g), the energy released is \(239\times2\) kJ.
$$239\times2=478$$

Answer:

478 kJ