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Chemical Engineering - Chemical Engineering Basics

Exercise : Chemical Engineering Basics - Section 9
16.
For the irreversible reaction, Ca+ 2C = Ca C2 , Δ H°298 = - 60000 J . mole-1 . If a system initially containing 2 moles of calcium, 3 moles of carbon and 1 mole of calcium carbide is allowed to react to completion, the heat evolved at 298 K will be
30000 J
60000 J
90000 J
240000 J
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
Projection welding & stud welding is categorised as the __________ welding.
pressure
thermit
resistance
arc
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
The driving force for the sintering of a powder compact is
strain energy.
surface energy.
volume energy.
stacking fault energy.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.
The amount of water evaporated in kg per kg of fuel burnt in a boiler is called the __________ of a boiler.
evaporative capacity
evaporation efficiency
thermal efficiency
steam load
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
Volumetric composition of flue gas analysed with the Orsat apparatus is : CO2 = 12%, O2 = 8%, CO = nil, N2 = 80%. This flue gas composition indicates that
pure oxygen has been used for combustion.
nitrogen percentage in the fuel is very high.
excess air has been used for combustion.
hydrogen is not present in the fuel.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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