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3 years ago

Based on this simulation, how does the greenhouse keep plants warm? Use "infrared photons" in your explanation.

2 answers:

7 0

Question: Next, click the Glass Layers tab in the black bar at the bottom of the simulation. Use the arrow in the Options field on the right to add one or more glass panes. This simulation shows how different photons would react to a layer of glass surrounding Earth, much like an actual greenhouse. How do the sunlight photons and infrared photons react differently to the glass layer(s)?

Edmentum answer: The visible light photons pass through the glass unaffected. However, the infrared photons that Earth reflects often change direction or are absorbed back into Earth’s surface when they interact with the glass.

frez [133]3 years ago

6 0

Answer: During the day, a typical greenhouse will trap Infrared photons from the sun, which allows the plants inside to stay warm at night. ... The much needed sunlight will still come through but the extra layer of protection will keep your plants safe at night

Explanation: Hope that helps :)

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Be sure to answer all parts. one of the most important industrial sources of ethanol is the reaction of steam with ethene derive

lions [1.4K]

Answer: 2.17x10⁻³ atm

Explanation:

First, we must write the balanced chemical equation for the process:

C₂H₄(g) + H₂O(g) ⇌ C₂H₅OH(g)

The chemical reactions that occur in a closed container can reach a state of chemical equilibrium that is characterized because the concentrations of the reactants and products remain constant over time. The equilibrium constant of a chemical reaction is the value of its reaction quotient in chemical equilibrium.

The equilibrium constant (K) is expressed as the ratio between the molar concentrations (mol/L) of reactants and products. Its value in a chemical reaction depends on the temperature, so it must always be specified.

We will use the the equilibrium constant Kc of the reaction to calculate partial pressure of ethene. The constant Kc for the above reaction is,

Kc = $\frac{[C_{2} H_{5}OH]}{[H_{2}O][C_{2} H_{4}]}$

According to the law of ideal gases,

PV = nRT

where P, V, n and T are the pressure, volume, moles and temperature of the gas in question while R is the gas constant (0.082057 atm L / mol K) .

We can use the ideal gas law to determine the molar concentrations ([x] = n / V) from the gas pressures of ethanol and water, assuming that all gases involved behave as ideal gases. In this way,

PV = nRT → P = (n/V) RT → P = [x] RT → [x] = P / RT

So,

$[C_{2} H_{5}OH] = \frac{200 atm}{0.082057 \frac{atm L}{mol K} x 600 K } = 4.06 \frac{mol}{L}$

$[H_{2}O] = \frac{400 atm}{0.082057 \frac{atm L}{mol K} x 600 K } = 8.12 \frac{mol}{L}$

So, the molar concentration of ethene (C₂H₄) will be,

$[C_{2} H_{4}] = \frac{[C_{2} H_{5}OH]}{[H_{2}O] x Kc} = \frac{4.06 \frac{mol}{L} }{8.12 \frac{mol}{L}x9.00 x 10^{3} \frac{L}{mol} } = 5.56 x 10^{-5}\frac{mol}{L}$

Then, according to the law of ideal gases,

$P_{C_{2} H_{4}} = [C_{2} H_{4}]RT = 5.56 x 10^{-5} \frac{mol}{L} x 0.082057 \frac{atm L}{mol K} x 600 K = 2.17x10^{-3} atm$

So, when the partial pressure of ethanol is 200 atm and the partial pressure of water is 400 atm, the partial pressure of ethene at 600 K is 2.17x10⁻³ atm.

7 0

3 years ago

In order for substances to dissolve in water, the substances should be bonded by: ionic bonds only covalent bonds only either io

SashulF [63]

I think that it would be either ionic bonds or covalent bonds

5 0

3 years ago

Why are molecule atoms as far away from each other as possible

iVinArrow [24]

According to VSEPR theory, molecular geometry can be predicted by starting with the electron pair geometry about the central atom and adding atoms to some or all of the electron pairs.

7 0

3 years ago

An open box of bandages is on the floor.Bandages wrappers are found nearby,what chemical treatment do you use.

Bingel [31]

You can use luminal to make it more visible. Trust me this is the answer because I had this question in my book. Hope it's useful.

4 0

3 years ago

How to find the valence electrons on a periodic table + energy levels?

Zigmanuir [339]

The answer is elements in the first row (hydrogen and helium) will have outer electrons in the first energy level. Their principal quantum number is 1. Elements in the second row (lithium through neon) will have valence electrons in the second energy level with a principal quantum number of 2. I hope that helps.

3 0

3 years ago