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3 years ago

suppose you wanted to change the rate of a chemical reaction. what might you change in the reaction? explain the factor

Chemistry

1 answer:

jekas [21]3 years ago

4 0

You could lower the heat so that the molecules move slower

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the heat of fusion of acetone is 5.7 kJ/mol. Calculate to two significant figures the entropy change when 6.3 mol of acetone mel

shtirl [24]

Answer: The entropy change of the process is $2.0\times 10^2J/K$

Explanation:

To calculate the entropy change for different phase at same temperature, we use the equation:

$\Delta S=n\times \frac{\Delta H_{f}}{T}$

where,

$\Delta S$ = Entropy change

n = moles of acetone = 6.3 moles

$\Delta H_{f}$ = enthalpy of fusion = 5.7 kJ/mol = 5700 J/mol (Conversion factor: 1 kJ = 1000 J)

T = temperature of the system = $-94.7^oC=[273-94.7]=178.3K$

Putting values in above equation, we get:

$\Delta S=\frac{6.3mol\times 5700J/mol}{178.3K}\\\\\Delta S=201.4J/K=2.0\times 10^2J/K$

Hence, the entropy change of the process is $2.0\times 10^2J/K$

4 0

3 years ago

Convert 112°C to Kelvin.

podryga [215]

112°C is 385.15 Kelvin

5 0

3 years ago

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Please someone help me ASAP! I literally posted this question many times and no one is answering! also, PLEASE DO NOT GIVE ME A

blondinia [14]

The electron bit would be 2 and you could colour in 4 boxes:) I had the same question as this and I got it correct

8 0

3 years ago

A substance composed of two or more elements in a fixed, definite proportion is.

Arisa [49]

Answer:

Compound

Explanation:

-compound is a chemical substance composed of many identical molecules composed of atoms from more than one element held together by chemical bonds.

7 0

2 years ago

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A student is working with four beakers that each contains a clear liquid. Which set of procedures would be best to use to determ

telo118 [61]

Answer:

Observe odor, determine pH, determine density, determine boiling point

Explanation:

The correct procedures that would be best to use to determine whether a beaker contains only distilled water would be to observe the odor of the liquid in the beaker, determine the pH of the liquid, determine the density, and then determine the boiling point of the liquid.

Water is generally odorless and has a pH of approximately 7 with a density of 1 kg/m3 and a boiling point of 100 $^oC$ . If the liquid in the beaker ticks all these conditions, then it can be established to be only distilled water.

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3 years ago