Use the following information to answer questions 2 through 8: Diethyl ether, CH
ID: 1011476 • Letter: U
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'.