Chemistry, 02.08.2019 00:00 AD4MF4HM1

How much energy is released when 65.8 g of water freezes

Answers: 2

Show answers

Answers

The amount of energy released is calculated by the product of heat of fusion and mass. The formula of amount energy released is given by: $q= L\times m$ (1)

Here,

q is amount of energy released L is heat of fusion ( 334 J/g ) m is mass of water Put all the given values in equation (1)

$q= 334 J/g \times 65.8 g$

q= 21977.2 Joules ≅ 21977 Joules

q= 21977 Joules

Thus, amount of energy released is 21977 Joules

Answer from: sa9334

The amount of heat release to freeze 65.8 g liquid water is $\boxed{-{\text{21}}{\text{.98 kJ}}}$ .

Further explanation:

Latent heat

The heat released or absorbed during the process of conversion physical state of a substance without altering the temperature is known as the latent heat.

In other words, when the physical state changes from liquid phase to solid phase without altering the temperature then the amount of heat released in this process is known as the latent heat fusion.

The formula to calculate heat released from the latent heat of fusion is,

${\text{q}}={\text{m}}{{\text{H}}_{\text{f}}}$ …… (1)

Here,

q is heat released.

m is mass of substance.

${{\text{H}}_{\text{f}}}$ is latent heat of fusion.

The mass of given liquid water is 65.8 g.

The latent heat of fusion for freezing process of water is -334 J/g.

Substitute 65.8 g for m and -334 J/g for ${{\text{H}}_{\text{f}}}$ in equation (1) as follows:

$\begin{aligned}{\text{q}}&={\text{m}}{{\text{H}}_{\text{f}}}\\&=\left({65.8{\text{ g}}}\right)\left({-334{\text{ J/g}}}\right)\\&=-21977.2{\text{ J}}\\\end{aligned}$

Here negative sign shows that heat is released in the process.

The heat released to freeze 65.8 g liquid water is 21977.2 J.

The heat released in kilojoule is,

$\begin{aligned}{\text{q}}&=\left({-21977.2{\text{ J}}}\right)\left({\frac{{1{\text{ kJ}}}}{{1000{\text{ J}}}}}\right)\\&=-21.9772{\text{ kJ}}\\&\approx-{\text{21}}{\text{.98 kJ}}\\\end{aligned}$

Learn more:

1. The difference between heat and temperature.:

2. Determine the process by which water enters into atmosphere?:

Answer details:

Grade: Senior School

Subject: Chemistry

Chapter: Thermodynamics

Keywords: Latent, Heat, fusion, Latent heat of fusion, temperature, ice, water, vapors, equilibrium, heat required, heat released melting, heat release, heat absorbed, 21.98 kJ.

Answer from: Quest

14,16 18 reacts with group

Answer from: Quest

fdvwsa gfwsargebgeebbfwfwffw gwf vgwgw gw f gwgw fgw v v dsv dwfff

Another question on Chemistry

Chemistry, 21.06.2019 20:00

When a comet collides with earth, it adds material to our planet and causes great damage. therefore, a collision like this is a a. destructive force b. constructive force c. geologic process and event d. constructive and destructive force

Answers: 1

Answer

Chemistry, 21.06.2019 22:20

Calcium hydride (cah2) reacts with water to form hydrogen gas: cah2(s) + 2h2o(l) → ca(oh)2(aq) + 2h2(g) how many grams of cah2 are needed to generate 45.0 l of h2 gas at a pressure of 0.995 atm and a temperature of 32 °c?

Answers: 2

Answer

Chemistry, 22.06.2019 07:30

Which of the following best supports the concept that genetic information is passed on to offspring from both of their parents, not just one?

Answers: 2

Answer

Chemistry, 22.06.2019 15:20

Water is initially present in a state where its molecules are far apart. during a change of state, its molecules slow down. which change of state has most likely taken place? from a gas to a liquid from a liquid to a gas from a solid to a liquid from a gas to a plasma

Answers: 1

Answer

You know the right answer?

How much energy is released when 65.8 g of water freezes...

Questions