Physics, 14.10.2019 20:30 montgomerykarloxc24x

How much heat is released upon converting one mole of steam (18.0
g. from 100.0 ∘c to water at 25.0 ∘c?

Answers: 3

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Answer from: kordejah348

4.65 × 10⁴ Joules of heat is released upon converting one mole of steam to water.

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Further explanation

Specific Heat Capacity is the amount of energy needed to raise temperature of 1 kg body for 1°C.

$\large {\boxed{Q = m \times c \times \Delta t} }$

Q = Energy ( Joule )

m = Mass ( kg )

c = Specific Heat Capacity ( J / kg°C )

Δt = Change In Temperature ( °C )

Let us now tackle the problem!

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Given:

initial temperature of steam = t = 100.0°C

specific heat capacity of water = c = 4.186 J/gK

mass of steam = m = 18.0 gram

final temperature of water = t' = 25.0°C

specific latent heat of vaporization of water = Lv = 2268 J/g

Asked:

heat released = Q = ?

Solution:

$\boxed {\large {\texttt{steam 100}^oC \overset{[Q_1]}{\rightarrow} \texttt{water 100}^oC \overset{[Q_2]}{\rightarrow} \texttt{water 25}^oC}}$

Q = Q_1 + Q_2

$Q = mL_v + mc\Delta t$

Q = 18.0(2268) + 18.0(4.186)(100-25)

Q = 40824 + 5651.1

$Q = 46475.1 \texttt{ Joules}$

$Q \approx 4.65 \times 10^4 \texttt{ Joules}$

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Learn moreEfficiency of Engine : Flow of Heat : Difference Between Temperature and Heat :

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Answer details

Grade: College

Subject: Physics

Chapter: Thermal Physics

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Keywords: Heat , Temperature , Block , Aluminium , Ice , Cold , Water

How much heat is released upon converting one mole of steam (18.0 g. from 100.0 ∘c to water at 25.0

Answer from: NNopeNNopeNNope

The amount of heat released in conversion of the $1\text{ mole}$ steam into water is $\boxed{4.65\times10^4\text{ J}}$ .

Explanation:

Given:

The amount of water present in $1\text{ mole}$ is $18\text{ gm}$ .

The final temperature of the water is $25^\circ\text{ C}$ .

Concept:

The amount of heat released in the conversion of the steam into water at $25^\circ\text{ C}$ involves the conversion of the steam at $100^\circ\text{ C}$ into the water at $100^\circ\text{ C}$ and then the water at $100^\circ\text{ C}$ releases the energy to come to $25^\circ\text{ C}$ .

The energy released in the conversion of the steam into the water is called as the latent heat of vaporization.

The total energy released in the conversion of the steam into water is given by:

$\boxed{Q_{\text{total}}=m.L_v+mC\Delta T}$

Here, $Q_{\text{total}}$ is the total amount of heat, is the mass of water, L_v is latent heat of vaporization of water, is the specific heat capacity of water and $\Delta T$ is the change in temperature.

The latent heat of vaporization of water is $2268\text{ J/g}$ and the specific heat capacity of water is $4.2\text{ J/g.K}$ .

Substitute the values on above expression.

$\begin{aligned}Q_{\text{total}}&=18(2268)+18(4.2)(100-25)\\&=4.08\times10^4+5.67\times10^3\\&\approx4.65\times10^4\text{ J}\end{aligned}$

Thus, The amount of heat released in conversion of the $1\text{ mole}$ steam into water is $\boxed{4.65\times10^4\text{ J}}$ .

Learn More:

1. The mass of the water in the calorimeter

2. Time taken by the water to convert into steam

3. Amount of energy required to raise the temperature of copper

Answer Details:

Grade: Senior School

Subject: Physics

Chapter: Heat Transfer

Keywords:

heat, released, water, steam, latent heat, specific heat capacity, vaporization, one mole, conversion, 25 degree, 100 degree.

Answer from: Quest

-first use of geothermal energy occurred more than 10,000 years ago in north america by american paleo-indians

-the first industrial use of geothermal energy began near pisa, italy in late 18th century

-in 1904, italian scientist piero ginori conti invented the first geothermal electric power plant in which steam was used to generate the power

-with the above experiment, the first geothermal plant in usa started in 1922 with a capacity of 250 kilowatts

-however, in 1946 first ground-source geothermal heat pump installed at commonwealth building in portland, oregon

-during the 1960’s, pacific gas and electric began operation of first large scale geothermal power plant in san francisco, producing 11 megawatts

-in 1973, when oil crisis began many countries began looking for renewable energy sources and by 1980’s geothermal heat pumps (ghp) started gaining popularity in order to reduce heating and cooling costs

-as effect of climate change started showing results, governments of various countries joined hands to fight against it, for which kyoto protocol was signed in japan in 1997, laid out emission targets for rich countries and required that they transfer funds and technology to developing countries, 184 countries have ratified it

hope this

Answer from: Quest

overcharge is the right answer system

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