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LuckyWell [14K]
2 years ago
8

Sixth-grade students conduct a laboratory experiment investigating the flow of thermal energy. They place a sealed plastic bag f

illed with water at 60°C into a beaker filled with an equal amount of water at 80°C. They then put the beaker with the plastic bag in an insulated container.
Based on the flow pattern of thermal energy, what can students predict will most likely happen in about an hour?



A. Thermal energy will flow from the cooler water in the plastic bag to the warmer water in the beaker so that the temperature of the water in the beaker will be 60°C and the temperature of the water in the plastic bag will be 80°C.


B. Thermal energy will flow from the warmer water in the beaker to the cooler water in the plastic bag so that the temperature of the water in the plastic bag will be 80°C and temperature of the water in the beaker will be 60°C.


C. Thermal energy will flow from the warmer water in the beaker to the cooler water in the plastic bag so that the temperature of the water in both the plastic bag and the beaker will be 70°C.


D. Thermal energy will flow from the cooler water in the plastic bag to the warmer water in the beaker so that the temperature of the water in both the beaker and the plastic bag will be 70°C.

Chemistry
1 answer:
kaheart [24]2 years ago
4 0
I think it’s A correct me if I’m wrong tho
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A chemical plant produces ammonia using the following reaction at a very high temperature and pressure. Which design issue is mo
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Answer:

D. The equipment needed to accommodate the high temperature and pressure will be expensive to produce.​

Explanation:

Hello!

In this case, for the considered reaction, it is clear it is an exothermic reaction because it produces energy; and therefore, the higher the temperature the more reactants are yielded as the reverse reaction is favored. Moreover, since the effect of pressure is verified as favoring the side with fewer moles; in this case the products side (2 moles of ammonia).

In such a way, the high pressure favors the formation of ammonia whereas the high temperature the formation of hydrogen and nitrogen and therefore, option A is ruled out. Since the high pressure shifts the reaction rightwards and the high temperature leftwards, we would not be able to know whether the reaction has ended or not because it will be a "go and come back" process, that is why B is also discarded. Now, since hydrogen and nitrogen would be the "wastes", we discard C because they are not toxic. That is why the most accurate answer would be D. because it is actually true that such equipment is quite expensive.

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6 0
3 years ago
An atom of chlorine has several valence electrons in its
RUDIKE [14]
7 valence electrons in an atom

7 0
3 years ago
I'm currently doing a Castle Learning part teacher and it's graded
kipiarov [429]

See the image below.

An excited electron is in a <em>high-energy state</em>.

When it drops to the lower-level ground state, it must get rid of this excess energy by <em>emitting it</em> as a quantum of light.

4 0
3 years ago
a cylinder with a movable piston contains 250 cm3 air at 10°C. if the pressure is kept constant, at what temperature would you e
soldi70 [24.7K]

Answer:

T₂ = 169.89 K

Explanation:

Given data:

Initial volume = 250 cm³

Initial temperature = 10°C (10+273.15 K = 283.15 K)

Final temperature = ?

Final volume = 150 cm³

Solution:

The given problem will be solve through the Charles Law.

According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.

Mathematical expression:

V₁/T₁ = V₂/T₂

V₁ = Initial volume

T₁ = Initial temperature

V₂ = Final volume  

T₂ = Final temperature

Now we will put the values in formula.

V₁/T₁ = V₂/T₂

T₂ = T₁V₂/V₁  

T₂ = 283.15 K × 150 cm³ /  250 cm³

T₂ = 42472.5 K. cm³  / 250 cm³

T₂ = 169.89 K

5 0
3 years ago
How many moles of SnF2 will be produced along with 48 grams of H2
wolverine [178]

Answer:

24 moles

Explanation:

given data

H_2 = 48 grams

to find out

how many moles of SnF_2 will be produced

solution

we know that Stoichiometry is here as

Sn+2HF\rightarrow SnF_2+H_2      ......................1

so we get here mole of solute H_2 that is express as

mole = \frac{\text{given mass}}{\text{Molar Mass}}      ..........................2

put here value for H_2  

mole = \frac{48}{2}  

mole of H_2 = 24 mole

and

we can say that here as per equation 1 that one mole of H_2  is go with one mole of SnF_2

so here H_2 24 mole is go with 24 moles mole of SnF_2  

so we can say SnF_2 will be produced 24 moles

5 0
3 years ago
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