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3 years ago

where will you find maximum rate of evaporation - ocean, pond or an aquarium? Give reason to support your answer.

2 answers:

7 0

the ocean because of the fact that in an aquarium if its indoors the sun wont hit it at al even if its outdoors the ocean is way to huge and its because of the ocean that we have clouds. Pond, same thing the ocean beats it

arsen [322]3 years ago

6 0

The answer is Ocean.
Oceans are larger than ponds and or an aquarium. Hence they possess wider exposed surface with more number of free surface molecules.Greater the number of surface molecules, greater number of molecules may escape from the surface easily..and hence greater will be the rate of evaporation.
The rate of evaporation depends even on the external climatic conditions such as Temperature, Wind, Pressure etc.
Higher the temperature. higher will be the rate of evaporation.

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Lighters are usually fueled by butane (c4h10). when 1 mole of butane burns at constant pressure, it produces 2658 kj of heat and

Leokris [45]

Answer:

ΔE = -2661 KJ/mole

ΔH = -2658 KJ/mole

Explanation:

ΔH = q - PΔV

ΔE = q + w

First, to find ΔE:

The reaction PRODUCES 2658 kJ of h (q), and does 3 kJ of work (w).

2658 kJ(q) + 3 kJ(w) = 2661 kJ, BUT the reaction PRODUCES heat, which means ΔE is negative.

ΔE = -2661 KJ/mole

Second, to find ΔH:

ΔH = q - PΔV

ΔH = 2658 kJ(q) - PΔV

Now, the question states that butane burns at a constant pressure; that just translates to the pressure of the reaction is equal to 0.

ΔH = 2658 KJ(q) - (0)ΔV

ΔH = 2658 KJ - 0

ΔH = 2658 kJ, BUT, like before, the reaction PRODUCES heat, which also mean ΔH is negative.

ΔH = -2658 KJ/mole

I hope this helped! Have a nice week.

5 0

3 years ago

3. Rebecca puts her backpack on a fan cart and turns the fan on. She then measures the speed each second afterward. At 10 second

Dmitrij [34]

Answer:

u just have to multiply 20x12 because its tells ya how fast the cart will be moving at 12 sec.

Explanation:because its tells ya how fast the cart will be moving at 12 sec.

7 0

3 years ago

Which one of the following will change the value of anequilibrium constant?

IRINA_888 [86]

Answer:

d. changing temperature

Explanation:

The thermodynamic equilibrium constant K is defined as a quantity characterizing the equilibrium of a chemical reaction. For a reaction where concentrations are in equilibrium:

aA + bB ⇄ cC + dD

The equilibrium constant is:

$k = \frac{[C]^c[D]^d}{[A]^a[B]^b}$

Thus, the equilibrium constant will change if:

a. Varying the initial concentration of reactants . FALSE. The k constant doesn't depend of initial concentrations but concentration in equilibrium does.

b. Adding other substances that do not react with any of thespecies involved in the equilibrium . FALSE. The equilibrium constant just depends of substances that are involved in the equilibrium

c. Varying the initial concentration of products . FALSE. Again, equilibrium constant doesn't depend of initial concentrations.

d. Changing temperature . TRUE. As a thermodynamic constant, k depends of temperature thus:

$K = e^(-dG/RT)$

e. Changing the volume of the reaction vessel. FALSE. The changing in the volume of the reaction vessel will change just the initial concentrations of the reactants.

I hope it helps!

6 0

3 years ago

nataly862011 [7]

Answer:

Explanation:

a is the right answer abi

5 0

3 years ago

When might it be preferable to use direct quotations rather than summarizing or paraphrasing

Drupady [299]

Answer:

It is better to use direct quotation rather than summarizing or paraphrasing when you want to share the author's original words.

Explanation:

In writing, it is sometimes necessary to share an authors original words in order to buttress a point or validate an argument. In such cases where it is necessary to use exactly the same diction as the author in order to communicate a point clearly, it is apt to use a direct quotation rather than attempting to summarize or paraphrase the original words of the author.

Hence direct quotation is used to share an author's original words.

5 0

3 years ago

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