Question
Asked Dec 15, 2019
21 views

Calculate the amount of heat needed to boil

149.g

of ethanol (

CH3CH2OH

), beginning from a temperature of

−89.9°C

. Be sure your answer has a unit symbol and the correct number of significant digits.

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Expert Answer

Step 1

Given:

Mass of ethanol=149.g

Temperature=-89.9oC

Step 2

Ethanol boiling point is 78.37oC.

The temperature change is given as

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AT=T -T, finalinitial =(78.37°C)-(-89.9°C) =168.27°C

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Step 3

To calculate amount of heat:

...

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q=mcAT where, q-amountof heat transfered m=mass of ethanol c=specific heat capacity of ethanol=2.46J/g°C AT=change in temperature,T, -T,

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Chemistry

Physical Chemistry

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