Question

Asked Feb 4, 2019

A mixture of methanol (methyl alcohol) and water contains 70.00 % water by mass.

The specific gravity of water at 20°C is about 0.9982; the specific gravity of methanol at 20°C is about 0.7917.

I worked out the specific gravity of the mixture to be 0.958.

What is the volume of the solution required to provide 200.0 moles of methanol?

Step 1

It is given that a mixture of methanol (methyl alcohol) and water contains 70.00 % water by mass.

Basis: 100 grams of mixture

Hence mass of water present in mixture is: 70 gm

Mass of methanol in mixture is: 30 gm

And it is given that specific gravity of water at 20°C is about 0.9982; the specific gravity of methanol at 20°C is about 0.7917.

Assuming water as reference substance in the calculations of density from the specific gravity and assuming the density of water at the temperature 20°C is 1 g/cm^{3}.

Specific gravity of any substance is the ratio of the density of the substance at any temperature to the density of reference substance at the same temperature. Hence from the specific gravity’s formula, densities are calculated at 20°C as below:

Step 2

Hence

The volumes of the methanol and water in the mixture are given below:

Step 3

From volume additivity, the volume of the mixture will be addition of volume of methanol and the volume of water at 20&...

Tagged in

Q: EXERCISES Section 2.1 2.1. Minimum work of separation. A refinery stream is separated at 1,500 kPa i...

A: The minimum work in kJ/h required is calculated using below formula:

Q: This problem is (6.10) from a book "Thermodynamics and Statistical Mechanics An Integrated Approach...

A: Part (a): Given that the container is well insulated, N moles of a monoatomic ideal gas expands irre...

Q: This problem is (8.10) from a book "Thermodynamics and Statistical Mechanics An Integrated Approach...

A: For a system of variable composition (open system), the differential change in molar Gibbs free ener...

Q: 100 moles/ hr of gas containing 70% methane and 30% ethane is burned completely with 25% excess air....

A: (a) To determine the Adiabatic Flame Temperature (AFT) for the complete combustion of feed gas mixtu...

Q: This problem is (6.20) from a book "Thermodynamics and Statistical Mechanics An Integrated Approach...

A: Note: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question...

Q: This problem is (6.30) from a book "Thermodynamics and Statistical Mechanics An Integrated Approach...

A: The information provided in the question is as follows:Inside diameter of the hose is d1 = 5 cmNozzl...

Q: PLEASE ANSWER B, C AND D. PLEASE ANSWER B, C AND D. PLEASE ANSWER B, C AND D.

A: The question has too many sub parts, we are only answering first three partsPart (a)For tank A,Mass ...

Q: Wet towels at the Biltmore Hotel are dried in a continuous dryer after washing for use by hotel gues...

A: Let the basis of the calculation for the given process be 850 kg/day of the dry towels. Water is rep...

Q: A new engineering graduate was putin charge of a reactor. The engineer quickly learned that the proc...

A: Part (b)The Schematic diagram of the given process is drawn below. The basis of the calculation is t...