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Marrrta [24]
3 years ago
13

How much energy is needed to melt 25.4 grams of I2?

Chemistry
2 answers:
grandymaker [24]3 years ago
6 0

Answer : The energy needed to melt 25.4 grams of I_2 is, 1.57\times 10^{3}J

Explanation : Given,

Mass of I_2 = 25.4 g

H_{fus} = 61.7 J/g

As, 1 gram of I_2 melt to needed energy = 61.7 J

So, 25.4 gram of I_2 melt to needed energy = 25.4\times 61.7=1567.18J=1.57\times 10^{3}J

Therefore, the energy needed to melt 25.4 grams of I_2 is, 1.57\times 10^{3}J

Vilka [71]3 years ago
4 0
We know the equation of latent heat:

Q = mL

(Energy = mass * latent heat)

Therefore, this problem is a regular application of this:

Q = 25.4 * 61.7

Q = 1567,18

With the 3 digits:

Q = 1570 J
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