Gujarat Technological UniversitySummer 2026 examination

GTU 3130508 Material & Energy Balance Computation Summer 2026 Question Paper & PDF

B.E. · Chemical Engineering · Semester 3 · Subject code 3130508
Download official PDFView PDF here
Share with your class
Total
70 marks
To pass
23 marks (33%)
Duration
2.5 Hours 2:30 PM – 5:00 PM
Questions
5 with internal choice
No solutions on this paper yetNeed them for your exam? Ask once. Papers that students ask for are solved first, and we aim to add them within 24 hours.

Q.1

14 Marks
(a)
3 marks
Explain
i)Boyle’s law and
ii)Dalton’s law.
(b)
4 marks

The diameter and height of a vertical cylindrical tank are 5 ft and 6 ft 6 in respectively. It is full up to 75% height with carbon tetrachloride (CCl4), the density of which is 1600 kg/m³. Find the mass in kilograms.

(c)
7 marks

Cracked gas from a petroleum refinery has the following composition by volume: 45% methane, 10% ethane, 25% ethylene, 7% propane, 8% propylene, 5% n-butane. Find: a) the average molar mass of the gas mixture, and b) the composition by mass, and c) density of the gas mixture at 273 K and 101.325 KPa.

Q.2

14 Marks
(a)
3 marks

In a double effect evaporator plant, the second effect is maintained under vacuum of 475 torr. Find the absolute pressure in kPa and bar.

(b)
4 marks
Differentiate between intensive property and extensive property.
(c)
7 marks

The conductance of a fluid flow system is defined as the volumetric flow rate, to a pressure of one torr (133.233 Pa). For an orifice, the conductance C can be computed from where, A = area of opening, ft², T = temperature, 0R, M = Molar mass Convert the empirical equation in SI units.

(c)
7 marks

An aqueous solution of K2CO3 is prepared by dissolving 43 kg of K2CO3 in 100 kg of water at 293 K. Calculate the normality, molarity and molality of the solution. Density of the solution is 1.3 kg/L. Atomic mass of K is 39.

Q.3

14 Marks
(a)
3 marks
Define Fundamental and Derived Units with example.
(b)
4 marks

Using Watson equation, calculate latent heat of vaporization of acetone at 353 K. Data: Latent heat of acetone at 329.4 K = 29121 kJ/kmol Critical temperature of acetone = 508.1 K.

(c)
7 marks
Vapor phase oxidation of ethyl alcohol using copper catalyst at 550°C
produces acetaldehyde by the following reaction:
C2H5OH + 0.5 O2 → CH3CHO + H2O
Conversion of reaction is 30% and excess air supplied is 10%. Calculate
composition of product stream if 100 kg of C2H5OH per hr is fed to the
reactor.
(a)
3 marks

Define Standard heat of reaction, Standard heat of formation and Standard heat of combustion.

(b)
4 marks

Pure methane is heated from 303.15 K to 523.15 K at atmospheric pressure. Calculate the heat added per kmole methane using CP data. CP = a + bT + cT² + dT³ . Data for methane: a = 19.2494, b × 10³ = 52.1135, c × 10⁶ = 11.973, d × 10⁹ = -11.3173

(c)
7 marks
In the Deacon process for manufacturing chlorine, hydrochloric acid gas is
oxidized with air. The reaction taking place is:
4HCl + O2 → 2Cl2 + 2H2O
If the air is used in excess of 30% of that theoretically required and if the
oxidation is 80% complete, calculate the composition by volume of dry gases
leaving the reaction chamber.

Q.4

14 Marks
(a)
3 marks
Explain classification of material balance problems.
(b)
4 marks

If 10 kg of C7H16 reacts completely with stoichiometric quantity of O2, how many kg of CO2 will be found as product?

(c)
7 marks

The spent acid from nitrating process contains 21% HNO3, 55% H2SO4 and 24% H2O by weight. This acid is to be concentrated to contain 28% HNO3 and 62% H2SO4 by addition of concentrated sulphuric acid containing 93% H2SO4 (by wt) and concentrated nitric acid containing 90% HNO3 (by wt). Calculate the weights of spent acid, concentrated acids-HNO3 and H2SO4 that must be combined to obtain 1000 kg of the desired mixture.

(a)
3 marks
Discuss uses of recycling and bypassing operation.
(b)
4 marks

A sample of coal is found to contain 63% carbon and 24% ash on weight basis. The analysis of refuse after combustion shows 7% carbon and rest ash. Calculate the percentage of the original carbon unburnt in the refuse.

(c)
7 marks

2000 kg of wet solids containing 70% solids by wt. are fed to a tray dryer and dried by air. The product finally obtained is found to contain 1% moisture by weight, calculate: a) kg of water removed from wet solids b) kg of product obtained.

Q.5

14 Marks
(a)
3 marks
Define percentage conversion, percentage yield and selectivity.
(b)
4 marks
Discuss Proximate analysis of coal.
(c)
7 marks
An Orsat analysis of the flue gases from a boiler house chimney gives CO2:

11.4%, O2: 4.2% and N2: 84.4% (mole %). Assuming that complete combustion takes place, (a) Calculate the % excess air, and b). Find C:H ratio in the fuel.

(a)
3 marks
Explain Gross calorific value, Net calorific value.
(b)
4 marks

The GHV(gross heating value) of gaseous n- butane is 2877.40 kJ/ mol at 298 K. calculate its NHV (net heating value) in kJ/kg

(c)
7 marks

An Orsat analysis of the combustion products of a hydrocarbon liquid fuel gave the following results CO2: 10 %, CO: 0.6%, O2: 5.7%. N2: 79% (by volume). Calculate the C/H ratio (by wt) of liquid fuel.

More Material & Energy Balance Computation papers

Questions repeat across sessions. Working through two or three papers shows you which topics GTU asks most.

Summer 202570 marks · 5 questions

Other Semester 3 subjects

BE Chemical

3130502
Fluid Flow Operations
3130506
Applied Chemistry
3130507
Chemical Engineering Thermodynamics I
BE03005011
Chemical Engineering Thermodynamics-1

Preparing with friends?

Send this paper to your class group. Every question has its own link.

About this paper

Official Gujarat Technological University (GTU) examination paper for Material & Energy Balance Computation (Summer 2026, B.E. · Chemical Engineering, Sem 3). Features complete 70-mark regular & remedial examination pattern, official marking distribution across all 5 questions, and direct 1-click official PDF download.

Transcribed for student exam preparation from Gujarat Technological University official examination archives. Questions, syllabus guidelines, and curriculum marking schemes remain the intellectual property of Gujarat Technological University.

Download official PDF All Material & Energy Balance Computation Papers (2) →Report a typo or correction
ViewDownload PDF