Chemistry, 11.11.2019 00:31 24nelsoaddh

What is the total amount of heat required to completely melt 347 grams of ice at t's melting point

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Answer from: mikealonso

The amount of heat required to completely melt 347 g of ice is $\boxed{115.898{\text{kJ}}}$

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.

When the physical state changes from the solid phase to liquid phase then the amount of heat absorbed in this process to completely convert the solid into liquid without altering the temperature is known as the latent heat fusion.

The formula to calculate heat absorbed from latent heat of fusion is,

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

Here,

q is heat absorbed.

m is mass of substance.

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

The mass of given ice is 347 g.

The latent heat of fusion of ice is 334 J/g.

Substitute 347 g for m and 334 J/g for ${{\text{H}}_{\text{f}}}$ in equation (1) as follows:

$\align{{\text{q}}&={\text{m}}{{\text{H}}_{\text{f}}}\cr&=\left( {347{\text{ g}}}\right)\left({334{\text{ J/g}}}\right)\cr&=115898{\text{ J}}\cr}$

The heat required to completely melt 347 g of ice is 115898 J.

The heat required in kilojoule is as follows:

$\begin{aligned}q&=(115898\text{ J})\left(\dfrac{1\text{ kJ}}{1000\text{ J}}\right)\\&=115.898\text{ kJ}\end$

Learn more:

1. The difference between heat and temperature.:link

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

Answer details:

Grade: Senior School

Subject: Chemistry

Chapter: Thermodynamics

Keywords: Latent, Heat, fusion, Latent heat of fusion, temperature, ice, water, vapors, equilibrium, heat required, melting, heat release, heat absorbed, 115.898 kJ.

Answer from: Quest

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and conduct electricity easily while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.

Answer from: Quest

(no3)⁻n has oxidation number x,o has oxidation number -2.(x*1 -2*3) charge of the nitrate ion, and we know that charge of the nitrate ion =-1.so,(x*1 -2*3) =-1x-6=-1x=+5answer a. +5.

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