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Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
DIPLOMA ENGINEERING SEMESTER -III• EXAMINATION SUMMER 2017
Subject Code: 330503 Date: 03 05 2017
Subject Name: Industrial Stoichiometry
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make Suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
4. Use of programmable Communication aids are strictly prohibited.
5. Use of only simple calculator is permitted in Mathematics.
6. English version is authentic.
Q.1

Define and give unit: Pressure Power Heat Mole
08



08

Air has molar composition N2 78 O2 Ar Convert it into mass percentages.


N2 78 O2 Ar

Q.2

Prove Mole Pressure Volume
07



07

Find equivalent weight of CaCo3 and H2SO4


CaCo3 H2SO4

OR

Calculate mass of NaOH required to Prepare 2.5 liter 0.25N and 0.5M aqueous solution.


2.5 0.25N 0.5M NaOH

Q.3

Define: Dew point Absolute humidity Specific heat Heat of formation
08



08

Find value of R if one gmmole gas occupies 22.4 liter at STP. Take unit of mole as gmmole, Pressure as Atmosphere and Volume as cm3 and temperature as Kelvin.


STP gmmole 22.4 liter R gmmole, Kelvin

OR
Q.3

15 kg water is heated from 30 0C to 50 0C. Average specific heat is 1 Kcal/Kg0C. Calculate heat required.
08


15 kg 30 0C 50 0C 1
08
2/2
Kcal/Kg0C

Define Limiting component Yield Conversion


Limiting component Yield Conversion

Q.4

Calculate standard heat of reaction CaC2 2H2O → C2H2 Standard heat of formation data(MJ/Kmol) ΔHf0 CaC2 62.7, ΔHf0 H2O(l) -285.8, ΔHf0 -986.6, ΔHf0 C2H2 226.8
07


CaC2 2H2O → C2H2 ΔHf0 CaC2 62.7, ΔHf0 H2O(l) -285.8, ΔHf0 -986.6, ΔHf0 C2H2 226.8
07

Pure methane is burnt with 20% excess dry air. Calculate flue gas analysis on dry basis.


20%

OR
Q.4

1000 kg/min 20% Ethanol is distilled to give distillate with 60% Ethanol and residue with Ethanol. Find mass flow rate of distillate and residue.
07


1000 kg/min 20% Ethanol distillate 60% Ethanol residue Ethanol Distillate residue mass flow rate
07

CaCo3 decomposes by reaction: CaCo3(s) → CaO(s) Find moles of CO2 produced from 200 kg CaCo3.


CaCo3 CaCo3(s) → CaO(s) 200 kg CaCo3 CO2

Q.5

If 50 kg of crystal contains moisture and dried to 0.3%. Calculate amount of water evaporated.
07


50 kg 0.3%
07

Write short note on calorific value of fuel.




OR
Q.5

Seeds have 20% oil, 70% solids and 10% Moisture. After extraction cake has 88% solid and oil. Calculate efficiency of extraction.
07


20% 70% Cake 88%
07

Derive CP CV R


CP CV R