Love1forever
contestada

How much energy is needed to melt 25.4 grams of I2?
Hfus=61.7 J/g

Type the correct answer to 3 digits. If the answer has an exponent, type the number, then ^, then the exponent.

(The picture might make the question more clearer.)

How much energy is needed to melt 254 grams of I2 Hfus617 Jg Type the correct answer to 3 digits If the answer has an exponent type the number then then the exp class=

Respuesta :

Ferraz
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

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

Explanation : Given,

Mass of [tex]I_2[/tex] = 25.4 g

[tex]H_{fus}[/tex] = 61.7 J/g

As, 1 gram of [tex]I_2[/tex] melt to needed energy = 61.7 J

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

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

Otras preguntas