2.3 The Upward Arrow
Upward arrow in a chemical reaction indicates
the evolution of a gas
. It appears only on the product side and is written next to the gaseous product. The representation of a dynamic equilibrium signifies a steady state in the concentrations of A and B and that a net change no longer occurs.
What describes how radiation moves?
Radiation happens
when heat moves as energy waves, called infrared waves
, directly from its source to something else. This is how the heat from the Sun gets to Earth. In fact, all hot things radiate heat to cooler things. When the heat waves hits the cooler thing, they make the molecules of the cooler object speed up.
What do the arrows represent gases?
2.3 The Upward Arrow
Upward arrow in a chemical reaction indicates
the evolution of a gas
. It appears only on the product side and is written next to the gaseous product. The representation of a dynamic equilibrium signifies a steady state in the concentrations of A and B and that a net change no longer occurs.
Which direction does heat flow from?
And unless people interfere, thermal energy — or heat — naturally flows in one direction only:
from hot toward cold
. Heat moves naturally by any of three means. The processes are known as conduction, convection and radiation. Sometimes more than one may occur at the same time.
Which accurately completes the statement conduction involves the transfer of electric charge or due to the movement of particles quizlet?
Explanation: Conduction involves the transfer of electric charge or
thermal energy
. due to the movement of particles.
How does heat move in convection?
Convection occurs when
particles with a lot of heat energy in a liquid or gas move
and take the place of particles with less heat energy. Heat energy is transferred from hot places to cooler places by convection. Liquids and gases expand when they are heated. … The denser cold liquid or gas falls into the warm areas.
Which indicates that thermal energy is no longer being transferred from boiling water to a mug?
Explanation: The thermal energy is no longer being transferred from boiling water to a mug in the case when
water and the mug are at the same temperature
. When a substance is heated, the increase in temperature will cause the particles to move faster and bump into each other. …
What is another example of radiation?
Radiation Examples
heat from a stove burner
.
visible light from a candle
.
x-rays from
an x-ray machine. alpha particles emitted from the radioactive decay of uranium.
How do you know the direction of energy flow?
When two bodies of different temperatures are brought into contact , heat flows by conduction from the body having higher temperature to the body of lower temperature. Here the direction of flow of heat is not determined by the heat contents of the two bodies, but it is determined
by the quantity called temperature
.
How will heat flow if you place an ice cube on a kitchen counter?
An ice cube is placed on a kitchen counter. … Heat flows from the counter to the ice, causing the molecules in the
counter to move more slowly
.
What happens to a solid when heated?
When a solid is heated
the particles gain energy and start to vibrate faster and faster
. … Further heating provides more energy until the particles start to break free of the structure. Although the particles are still loosely connected they are able to move around. At this point the solid is melting to form a liquid.
Which factors affect heat transfer between a warm and a cool substance quizlet?
Which factors affect heat transfer between a warm and a cool substance?
chemical composition of the substances. state of matter of the substances at room temperature. thermal equilibrium of the substances
.
Which condition must be met for conduction to occur?
This process of exchange of heat is known as conduction. For example, a metal spoon placed in a hot coffee mug shows flow of heat from coffee to the spoon. Thus, we can conclude that a condition which must exist in order for conduction to occur between two substances is
that the objects must be touching each other
.
Which areas of the diagram does conduction occur?
The molecules vibrate at their position and transfer heat to the neighboring molecules. In the diagram conduction takes place
at X and Z.
What are 3 ways heat can move?
- Conduction is the transfer of energy from one molecule to another by direct contact. …
- Convection is the movement of heat by a fluid such as water or air. …
- Radiation is the transfer of heat by electromagnetic waves.
What are 4 examples of convection?
- Breeze. The formation of sea and land breeze form the classic examples of convection. …
- Boiling Water. Convection comes into play while boiling water. …
- Blood Circulation in Warm-Blooded Mammals. …
- Air-Conditioner. …
- Radiator. …
- Refrigerator. …
- Hot Air Popper. …
- Hot Air Balloon.
