<span>During cooling, the kinetic energy of the molecules falls, be</span>cause, when cooling a substace, the particles (molecules) slow down.
The kinetic energy is related to the speed, such that the lower speed the lower kinetic energy.
Particles can translate and vibrate, in the case of gases and liquids, and only vibrate (in the case of solids).
As a substance is cooled the particles get closer and the motion (translation and vibration), slows down. You can see by the equation of the kinetic energy (KE):
KE = [1/2]mass×(speed)² that as the speed is lower the KE will also be lower.
Additionally, when the cooling does not drive a change of phase (gas to liquid, liquid to solid, or solid to gas), it drives a decrease on temperature. In this case you should know that the temperature is a measure of the kinetic energy: the lower the temperature, the lower the kinetic energy.
ΔSsys and ΔSsurr both have values larger than 0.
<h3>Entropy Change: What Is It?</h3>
- Entropy change is a phenomena that measures the evolution of randomness or disorder in a thermodynamic system.
- It has to do with how heat or enthalpy is converted during work.
- More unpredictability in a thermodynamic system indicates high entropy.
- Heat transport (delta Q) divided by temperature equals the change in entropy (delta S).
<h3>What causes variations in entropy?</h3>
- When a substance is divided into several pieces, entropy rises.
- Because the solute particles are split apart when a solution is generated, the dissolving process increases entropy.
- As the temperature rises, entropy increases.
learn more about entropy change here
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Burrows, tracks, coprolites, nests and footprints are examples of traces that can be found in a fossil.
Answer:
The 3rd answer down.
Na²O (sodium oxide) will be a base when exposed to water H²O
Explanation:
Sodium Oxide Na²O, will become Sodium Hydroxide after being exposed to water (at 80% I believe).
The oxygen ion in Na²O has 2 extra electrons which makes it highly charged and very attractive to hydrogen ions. The attraction is so strong that when Na²O comes in contact with H²O, the O(-2) strips off a hydrogen from water, forming 2 x OH ions which of course are still strongly basic.
igneous rocks cool very slowly
Explanation:
Large crystals are formed when rocks cool very slowly. This gives time for crystallization nuclei to form and other crystals aggregates round it.
- Large crystals in rocks are typical of intrusive igneous rocks.
- These rocks are formed beneath the earth surface and they usually have big crystals.
- This because they cool slowly and have time for crystal formation.
- Rocks that cools rapidly are extrusive igneous rocks.
- They are usually fine grained and glassy in nature.
learn more:
Volcanic eruptions brainly.com/question/5055821
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