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2 years ago

How is energy transferred during convection?

Chemistry

2 answers:

Doss [256]2 years ago

7 0

Answer:

The convection is a process by which heat energy can be transferred from one place to another through a medium. This process takes place in the liquid and air medium.

This process occurs in the atmosphere and in the mantle portion of the earth.

In the atmospheric region, the land area gets heated up due to the absorption of incoming solar radiation, as a result of which the air near the ground surface is heated up and becomes warm and less dense. This warm air then rises up into the upper portion carrying the heat energy from the lower region to the upper region. As the air rises upward, it cools down because of the lowering temperature and eventually falls back to the lower portion. This results in the formation of convection cells.

Similarly, in the layer of the mantle, convection currents are formed that carry the heat energy from the core of the earth towards the surface.

This is how energy is transferred by the process of conduction.

Natalija [7]2 years ago

4 0

The field of energy is wide and interesting due to it can be expressed by differents way.

The thermal energy is associated like internal energy of the atoms or molecules of a substance. The transfer of thermal energy as heat can take place via convection.

Convection via is the transfer of thermal energy due to the motion of the substance that contains the thermal energy.

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How many electrons will a neon (Ne) atom have when it has no charge?

Darya [45]

Answer:

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Explanation:

Once one shell is full, the next electron that is added has to move to the next shell. So... for the element of NEON, you already know that the atomic number tells you the number of electrons. That means there are 10 electrons in a neon atom.

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3 years ago

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2 years ago

For many purposes we can treat ammonia NH3 as an ideal gas at temperatures above its boiling point of −33.°C. Suppose the temper

Keith_Richards [23]

Answer:

The new pressure will be 0.225 kPa.

Explanation:

Applying combined gas law:

$\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}$

where,

$P_1\text{ and }V_1$ are initial pressure and volume at initial temperature $T_1$ .

$P_2\text{ and }V_2$ are final pressure and volume at initial temperature $T_2$ .

We are given:

$P_1=0.29 kPa\\V_1=V\\P_2=?\\V_2=V+50\% of V=1.5 V$

$T_1=-25^oC=248.15 K$

$T _2 = 16^oC=289.15 K$

Putting values in above equation, we get:

$\frac{0.29 kPa\times V}{248.15 K}=\frac{P_2\times 1.5V}{289.15 K}$

$P_1=0.225 kPa$

Hence, the new pressure will be 0.225 kPa.

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3 years ago

At what temperature will a solid melt?

jolli1 [7]

Answer:

A solid will melt at the temperature at which the kinetic energy breaks the inter-molecular attractions.

Explanation:

The melting point is the state at which "a substance changes its temperature from a solid to liquid". At the melting point temperature, there is an equilibrium between the both the solid and the liquid phase. When the solid particle is heated by increasing the temperature the particle in the solid vibrate quickly and it absorbs kinetic energy.

It leads to the breaking of the organisation of particle in between the solid and that leads to the melting of solid. Thus, at the melting point, the kinetic energy breaks the inter-molecular attractions.

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3 years ago

What are the chemical properties of CO2

Irina-Kira [14]

Answer:

Carbon dioxide is a linear covalent molecule.

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CO 2 + H2O ==> H2CO3

Carbon dioxide reacts with alkalis to give carbonates and bicarbonates.

CO 2 + NaOH ==> NaHCO3 (Sodium BiCarbonate )

NaHCO3 + NaOH ==> Na2CO3 (Sodium Carbonate) + H2O

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