Use the following information to answer questions 2 through 8: Diethyl ether, CH

Question

Use the following information to answer questions 2 through 8:

Diethyl ether, CH3CH2OCH2CH3 ,

specific heat solid:

1.89 J/g K

heat of fusion:

7.19 kJ/mol

normal melting point:

–116.3 °C

Molar mass:

74.1 g/mole

specific heat liquid:

2.32 J/g K

heat of vaporization:

27.2 kJ/mol

normal boiling point:

34.6 °C

specific heat gas:

1.61 J/g K

2. What phase does diethyl ether exist in at 25°C and 1atm?

specific heat solid:

1.89 J/g K

heat of fusion:

7.19 kJ/mol

normal melting point:

–116.3 °C

Molar mass:

74.1 g/mole

specific heat liquid:

2.32 J/g K

heat of vaporization:

27.2 kJ/mol

normal boiling point:

34.6 °C

specific heat gas:

1.61 J/g K

Explanation / Answer

Here just Question 2 is posted so I am answering that.

From the table given in the problem, we can see, normal boiling point of diethylether is -116.3oC. Also, the normal melting point is given as 34.6oC. Now, the meaning of 'normal' is nothing but 1 atm pressure.

So, we can say, below -116.3oC, it will be a solid, In between -116.3oC to 34.6oC it will be a liquid and above 34.6oC it will be gas when the pressure is 1 atm. Now, as the temperature given is 25oC, which is in between  -116.3oC to 34.6oC, so, it will be a liquid.

So, the correct option will be 'Liquid'.

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