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Ulleksa [173]
2 years ago
15

For the following following balance the equation and indicate the correct coefficients used. when Methanol (CH3OH) burns in oxyg

en, carbon dioxide, water and heat are produced.
Chemistry
1 answer:
Ahat [919]2 years ago
6 0

Answer:

CH₃OH + 1.5 O₂ ⇒ CO₂ + 2 H₂O

Explanation:

Let's consider the unbalanced chemical equation for the complete combustion of methanol.

CH₃OH + O₂ ⇒ CO₂ + H₂O

We will balance it using the trial and error method.

First, we will balance H atoms by multiplying H₂O by 2.

CH₃OH + O₂ ⇒ CO₂ + 2 H₂O

Finally, we get the balanced equation by multiplying O₂ by 1.5.

CH₃OH + 1.5 O₂ ⇒ CO₂ + 2 H₂O

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What is the entropy change for the freezing process of 1 mole of liquid methanol at its freezing temperature (–97.6˚C) and 1 atm
Rudiy27

Answer : The value of change in entropy for freezing process is, -18.07 J/mol.K

Explanation :

Formula used :

\Delta S=\frac{\Delta H_{freezing}}{T_f}

where,

\Delta S = change in entropy

\Delta H_{fus} = change in enthalpy of fusion = 3.17 kJ/mol

As we know that:

\Delta H_{fus}=-\Delta H_{freezing}=-3.17kJ/mol=-3170J/mol

T_f = freezing point temperature = -97.6^oC=273+(-97.6)=175.4K

Now put all the given values in the above formula, we get:

\Delta S=\frac{\Delta H_{freezing}}{T_m}

\Delta S=\frac{-3170J/mol}{175.4K}

\Delta S=-18.07J/mol.K

Therefore, the value of change in entropy for freezing process is, -18.07 J/mol.K

4 0
3 years ago
You and your friends decide to travel, on foot, to your favorite beach at the Jersey Shore. Your speed for the first part of the
Juli2301 [7.4K]

Answer:

Sorry dont know

Explanation:

8 0
3 years ago
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How does changing the pressure affect the chemical reaction?
olasank [31]
A is the answer
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6 0
3 years ago
What is the number of the group that has the most reactive nonmetals (give number and letter- Ex 1A, 2A, etc.)?​
Kryger [21]

Answer:

Group 7A

Explanation:

The group 7A elements consists of the most reactive non-metals on the periodic table.

This group is known as the group of halogens. They consist of element fluorine, chlorine, bromine, iodine and astatine.

  • The elements in this group have the highest electronegativity values.
  • They have 7 valence electrons and requires just one electron to complete their octets.
  • This way, they are highly reactive in their search for that single electron.
3 0
3 years ago
Calculate the percent errorin a length measurementof 4.45cm if the correct value is 4.06
FinnZ [79.3K]

Answer:

9.6 %

Explanation:

<u>Step 1: How to define  percent error ? </u>

⇒ % error is the difference between a measured value and the known or accepted value

⇒Percent error is calculated using the following formula:

⇒%error  =  | Experimental value-theoretical value/theoretical value |  x100%

⇔ this can be written as well as : error = (| Experimental value/ theoretical value | - | Theoretical value / Theoretical value | ) x100%

<u>Step 2: Calculate % error</u>

In this case, this means :

%error = ( |(4.45 cm - 4.06cm ) / 4.06cm | ) x100%

%error = 0.096 x100%

%error =9.6 %

3 0
3 years ago
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