Answer:
Explanation:
<u>1) Data:</u>
a) T = 25°C = 25 + 273.15K = 298.15 K
b) P = 1 atm
c) assumption: ideal gas
<u>2) Formulae and principles</u>
a) Ideal gas equation: p V = n R T, where:
- p = pressure
- V = volume
- n = number of moles
- R = universal constant of gases = 0.0821 atm-liter / K-mol
- T = absolute temperature (Kelvin)
b) Molar volume: ν = V / n, where:
- ν = molar volume
- V = volume
- n = number of moles
<u>3) Solution:</u>
- p V = n R T⇒ V/n = ν = RT / p =
= 0.0821 atm-liter / mol-K × 298.15 K / 1 atm
= 24.5 liter / mol
Answer:
- <em>When a sample of matter changes state from a solid to a liquid, its entropy</em> <u>increases</u>.
Explanation:
The <em>entropy</em> is a thermodinamic variable that measures the disorder of radomness of a substance or system.
In the <em>solid </em>stated the particles (molecules, atoms or ions) are tightly packed, forming an organized structure. So, the particles barely can move, just vibrating around their fixed positions.
In the <em>liquid </em>state the particles are more free to move (that is why liquids flow and take the shape of the vessel in which they are contained).
Then, you can predict that <em>when a matter changes state from a solid to a liquid</em>, the parciles will gain motion leading to a higher disorder, which means that the entropy increases.
Jets streams play a key role in determining the weather because they usually separate colder air and warmer air.
The volume occupied by the gas in the container is 1 m³
Boyles law applies
P₁ V₁ = P₂ V₂
Where P₁ = 200kpa
P₂ = 300kpa
if its initial volume is 1.5
then,
P₁ V₁ = P₂ V₂
200 × 1.5 = 300 × V₂
V₂ = 200 × 1.5 / 300
= 1 m³
Hence the volume occupied by the gas container is 1 m³
Learn more about the Boyles law on
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