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2 years ago

Is the flow of energy during vaporizing more like the flow of energy during melting or during freezing?

1 answer:

7 0

Vapourization is the conversion of the water into a gaseous state. The energy flow of vaporization is similar to that of the melting.

<h3>What are melting and vaporization?</h3>

Vapourization is the physical change that converts the liquid state of matter into a gaseous state. Whereas melting is the process that involves the conversion of the solid ice into the liquid water.

Both the process of vaporization and melting absorbs heat from their surrounding system to convert the state of matter, while the process of freezing release heat to convert the liquid into solid.

Therefore, the flow of energy of vaporization is similar to melting.

Learn more about vaporization here:

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A 1.50 L sample of H₂ gas at 3.50 atm was combined with 2.00 L of N₂ gas at 2.55 atm pressure at a constant temperature of 25.0

Mademuasel [1]

Answer:

The total pressure in the flask is 1,14 atm

Explanation:

We need to apply the Ideal Gas law to get the moles and then find out the total moles in the mixture

moles H2 + moles N2

P.V = n. R . T

1,50 L . 3,50atm = n . 0,08206 (L*atm)/(mol*K) . 298K

(1,50 L . 3,50atm) / 0,08206 (mol*K)/(L*atm) . 298K = n

(5,25 / 24,45) mol = n = 0,215 moles H2

2,55 atm . 2,00 L = n . 0,08206 (L*atm)/(mol*K) . 298K

(2,55 atm . 2,00 L) / 0,08206 (mol*K)/(L*atm) . 298K = n

(5,1 / 24,45) mol = n = 0,208 moles N2

Total moles = moles H2 + moles N2

0,215 moles H2 + 0,208 moles N2 = 0,423 moles

P.V = n. R . T

P . 9,10L = 0,423moles . 0,08206 (L*atm)/(mol*K) . 298K

P = (0,423moles . 0,08206 (L*atm)/(mol*K) . 298K ) / 9,10L

P = 1,14 atm

3 0

3 years ago

HURRY

zmey [24]

Answer:

Percent yield of reaction is 75%.

Explanation:

Given data:

Moles of A = 2.0 mol

Moles of B = 4.0 mol

Moles of C formed = 1.8 mol

Percent yield of reaction = ?

Solution:

Chemical equation:

2A + 5B → 3C + D

We will compare the moles of A and B with C from balance chemical equation.

A : C

2 : 3

B : C

5 : 3

4 : 3/5×4 = 2.4 mol

Number of moles of C formed by 4 moles B are less thus B is limiting reactant and will limit the yield of C.

Percent yield:

Percent yield = actual yield /theoretical yield × 100

Percent yield = 1.8 mol / 2.4 × 100

Percent yield =75%

8 0

3 years ago

(b) How many moles of hydrogen are needed to make 30 moles of Fe?<br><br> PLEASE HELP ASAP

iVinArrow [24]

Answer:

1 mole of Fe is 55.85 g per mole

Explanation:

hope it helps

6 0

3 years ago

Does anyone know this? help please

Sav [38]

Explanation:

The substance that is in excess that doesn't get used up as a reactant is called limiting reactant.

7 0

3 years ago

How does the displacement moved affect the amount of work done?

Sholpan [36]

The displacement affect the amount of work done by the fact that more displacement implies more work.

Option B

<u>Explanation:</u>

Work can be defined as the "measure of energy transfer" that occurs when an object is moved over a distance by an external force which is applied in the "direction of the displacement".

Work can be formulated as,

$W = (F \times s)\ N / m \\ \\Work = ( Force \times Displacement )\ Newton/meter$

From the above-mentioned formula, we can infer that Work is directly proportional to the displacement of the object.Therefore, more the work is more will be its displacement.

6 0

3 years ago