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azamat
3 years ago
12

In an exothermic reaction, the enthalpy change is negative. Which of the following is also true for an exothermic reaction?

Chemistry
2 answers:
Savatey [412]3 years ago
7 0
The statement that is also true for an exothermic reaction would be that the products have a lower potential energy than the reactants.
lakkis [162]3 years ago
3 0

<u>Answer: </u>The correct statement is the products have a lower potential energy than the reactants.

<u>Explanation:</u>

Exothermic reactions are defined as the reactions in which the enthalpy change of a reaction is negative.

Enthalpy of a reaction is determined by the equation:

\Delta H_{rxn}=\sum H_{products}-\sum H_{reactants}

As, the enthalpy change of the reaction is negative, which means that the potential energy of the products is less than the potential energy of the reactants.

Hence, the correct statement is the products have a lower potential energy than the reactants.

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The amount of matter in an object is called
marta [7]

Answer: Matter

Explanation:

Matter is anything that has volume and/or mass.

7 0
3 years ago
2. How many moles are in 8.30 x 1023 molecules of H2O?
daser333 [38]

Answer:

<h2>1.38 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L} \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{8.30 \times  {10}^{23} }{6.02 \times  {10}^{23} }  =  \frac{8.30}{6.02}  \\  = 1.3787 37...

We have the final answer as

<h3>1.38 moles</h3>

Hope this helps you

8 0
3 years ago
What is the name of the gas produced when nitric acid is added to copper metal? please help! much appreciated!
Lemur [1.5K]
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8 0
3 years ago
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3 0
2 years ago
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As the pressure on the surface of a liquid decreases, the temperature at which the liquid will boil
ankoles [38]

Answer: option (1) decreases.


Explanation:


May be you have experienced that: when you go to the beach, where the atmposhpere pressure is greater than the atmosphere pressure in places that are at higher altitudes, the water takes longer to boil. That is because the boiling temperature is greater, and you need more total heat (more time) to permit the liquid to reach that temperature.


The reason why that happens is because substances boil when the vapor pressure (the pressure of the particles of vapor over the liquid) equals the atmosphere pressure. So, when the atmposhere pressure increases, the temperature at which the vapor pressure reaches the atmosphere pressure also increases, and when the atmosphere pressure decreases, the temperature at which the vapor pressure reaches the atmosphere pressure decreases.



5 0
3 years ago
Read 2 more answers
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