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Mamont248 [21]
3 years ago
15

Which statement about spontaneous and non spontaneous processes is correct?

Chemistry
1 answer:
Masteriza [31]3 years ago
5 0

<u>Answer:</u>

option A is correct option.

Explanation :

A spontaneous method is capable of continuing during a given direction while not having to be driven by an outdoor supply of energy.

The laws of physical science govern the direction of a spontaneous method, guaranteeing that if a sufficiently sizable amount of individual interactions are concerned, then the direction can perpetually be within the direction of enhanced entropy.

Associate in Nursing endergonic reaction (also referred to as a nonspontaneous reaction) may be a chemical change during which the quality change in free energy is positive and energy is absorbed.

Endergonic processes will be pushed or force by coupling them to extremely exergonic reactions.

ΔG = ΔH - TΔS , ΔG is amendment within the free energy, ΔH is that the amendment in total heat, ΔS is that the amendment in entropy and T is temperature in kelvin.

Spontaneity of reaction Vs total heat Vs entropy

When ΔH is negative and ΔS is positive, ΔG are going to be negative over all temperatures.

When ΔH is negative and ΔS is negative, ΔG are going to be negative at low temperatures.

When ΔH is positive and ΔS is negative, ΔG won't be negative at any temperature. There would be no spontaneous reaction.

When ΔH is positive and ΔS is positive, ΔG are going to be negative at high temperatures.

Therefore, finally it's the amendment in free energy of a reaction which may predict if a reaction is possible.

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A gas that occupies 50.0 liters has its volume increased to 68 liters when the pressure was changed to 3.0 ATM. What was the ori
Yuliya22 [10]

Answer:

4.1 atm = 3,116 mmHg = 415.4 kPa

Explanation:

According to Boyle's law, as volume is increased the pressure of the gas is decreased. That can be expressed as:

P₁ x V₁= P₂ x V₂

Where P₁ and V₁ are the initial pressure and volume respectively, and P₂ and V₂ are final pressure and volume, respectively.

From the problem, we have:

V₁= 50.0 L

V₂= 68.0 L

P₂= 3.0 atm

Thus, we calculate the initial pressure as follows:

P₁= (P₂ x V₂)/V₁= (3.0 atm x 68.0 L)/(50.0 L)= 4.08 atm ≅ 4.1 atm

To transform to mmHg, we know that 1 atm= 760 mmHg:

4.1 atm x 760 mmHg/1 atm = 3,116 mmHg

To transform to kPa we use: 1 atm= 101.325 kPa

4.1 atm x 101.325 kPa = 415.4 kPa

5 0
3 years ago
Granite can form when magma cools within earth. Basalt can form when lava cools on earth surface. What do granite and basalt hav
Elodia [21]
They both can form from cooled magma
8 0
3 years ago
What volume of 0.100 m sodium chloride must be added to 75.0 ml of 0.200 m lead(ii) nitrate to precipitate all of the lead ions?
Svetradugi [14.3K]
Reaction for precipitation is
Pb(NO3)2(aq) + 2Nacl(aq)→PbCL2(s)+2NaNO3(aq)
The given reaction is 
The mol of Nacl required is =2×mol of Pb(NO3)2 which is present.
∴M(Nacl)×V(Nacl) =2×M(Pb(NO3)2 ×V(Pb(NO3)2
o.100M×V(Nacl)=2×0.200 MX75.0ML
V(Nacl = 300mL.
5 0
3 years ago
Using the equation below, if you have 4.3 mol of nitrogen tribromide and
ankoles [38]

Answer:

sodium hydroxide is the limiting reactant

Explanation:

The first step is usually to put down the balanced reaction equation. This is the first thing to do when solving any problem related to stoichiometry. The balanced reaction equation serves as a guide during the solution.

2NBr3 + 3NaOH = N2 + 3NaBr + 3HOBr

Let us pick nitrogen gas as our product of interest. Any of the reactants that gives a lower number of moles of nitrogen gas is the limiting reactant.

For nitrogen tribromide

From the balanced reaction equation;

2 moles of nitrogen tribromide yields 1 mole of nitrogen gas

4.3 moles of nitrogen tribromide will yield 4.3 ×1/ 2 = 2.15 moles of nitrogen gas

For sodium hydroxide;

3 moles of sodium hydroxide yields 1 mole of nitrogen gas

5.9 moles of sodium hydroxide yields 5.9 × 1/ 3= 1.97 moles of nitrogen gas

Therefore, sodium hydroxide is the limiting reactant.

8 0
3 years ago
A student wants to examine a substance by altering the bonds within its molecules. Which of the following properties of the subs
Marrrta [24]

Question is incomplete, the complete question is as follows:

A student wants to examine a substance by altering the bonds within its molecules. Which of the following properties of the substance should the student examine?

A. Toxicity, because it can be observed by altering the state of the substance

B. Boiling point, because it can be observed by altering the state of the substance

C. Toxicity, because it can be observed by replacing the atoms of the substance with new atoms

D. Boiling point, because it can be observed by replacing the atoms of the substance with new atoms

Answer:

B.

Explanation:

A student can examine a substance without altering the bonds within the molecules by examining its boiling point.

The boiling point is the property of a substance, at which the substance changes its state, which is from solid to liquid, liquid to gas and others. So, examining the boiling point will alter the bonds within the molecules as the state of substance will change.

Hence, the correct answer is "B".

6 0
3 years ago
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