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Alina [70]
3 years ago
11

In an exothermic reaction, energy may be released to the surroundings in the form of

Chemistry
2 answers:
djverab [1.8K]3 years ago
4 0
In the form of heat.
Charra [1.4K]3 years ago
4 0

Explanation:

A reaction in which energy is released in the form of heat is known as exothermic reaction.

General reaction equation for exothermic reaction is as follows.

          Reactants \rightarrow Products + Energy

For example, lightening a candle is an exothermic reaction.

Thus, we can conclude that in an exothermic reaction, energy may be released to the surroundings in the form of heat.

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2. A sample of neon gas has a volume of 87.6 L at STP. How many moles are present?
PSYCHO15rus [73]

Answer:

                      3.91 moles of Neon

Explanation:

According to Avogadro's Law, same volume of any gas at standard temperature (273.15 K or O °C) and pressure (1 atm) will occupy same volume. And one mole of any Ideal gas occupies 22.4 dm³ (1 dm³ = 1 L).

Data Given:

                 n = moles = <u>???</u>

                 V = Volume = 87.6 L

Solution:

               As 22.4 L volume is occupied by one mole of gas then the 16.8 L of this gas will contain....

                          = ( 1 mole × 87.6 L) ÷ 22.4 L

                          = 3.91 moles

<h3>2nd Method:</h3>

                     Assuming that the gas is acting ideally, hence, applying ideal gas equation.

                              P V  =  n R T      ∴  R  =  0.08205 L⋅atm⋅K⁻¹⋅mol⁻¹

Solving for n,

                              n  =  P V / R T

Putting values,

                              n  =  (1 atm × 87.6 L)/(0.08205 L⋅atm⋅K⁻¹⋅mol⁻¹ × 273.15K)

                              n  =  3.91 moles

Result:

          87.6 L of Neon gas will contain 3.91 moles at standard temperature and pressure.

7 0
3 years ago
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trapecia [35]
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6 0
3 years ago
Read 2 more answers
Water _____.
Sergio039 [100]

Answer: is neither an acid nor a base

Explanation: Water is a universal solvent which means it can dissolve most of the substances in it.

Water has high thermal heat capacity , which means large heat is required to heat the water.

Water is not always pure as it gets contaminated by various pollutants present in the atmosphere such as gases, bacteria and suspended matter.

Water is an amphoteric substance which can act as both acid and base, thus can donate and acept [texH^+[/tex] ions.Thus it is neither an acid nor a base.

HCl+H_2O\rightarrow H_3O^++Cl^-

Here water is accepting a proton, thus it acts as base.

NH_3+H_2O\rightarrow NH_4^++OH^-

Here water is donating a proton, thus it acts as acid.




4 0
3 years ago
A reaction that is NOT thermodynamically favored at low temperatures can become thermodynamically favored at high temperatures
Rom4ik [11]
Explanation:

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7 0
3 years ago
Why pure hydrogen is not used in ballons ?​
wariber [46]

Answer:  Hydrogen that is not used in balloons because hydrogen burns very easily.

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8 0
2 years ago
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