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MCQs

Total Questions : 368 | Page 33 of 37 pages
Question 321. What is the enthalpy of the reaction from 50°C to 52°C if CP = 15 J/°C, and the reference enthalpy is 25 J?
  1.    10 J
  2.    35 J
  3.    55 J
  4.    65 J
 Discuss Question
Answer: Option C. -> 55 J
Answer: (c).55 J
Question 322. What is the enthalpy of the reaction from 10°C to 15°C if CP = 5 J/°C, and the reference enthalpy is 25 J?
  1.    25 J
  2.    50 J
  3.    75 J
  4.    100 J
 Discuss Question
Answer: Option B. -> 50 J
Answer: (b).50 J
Question 323. What is the enthalpy of the reaction from 15°C to 25°C if CP = 3 J/°C, and the reference enthalpy is 15 J?
  1.    15 J
  2.    30 J
  3.    45 J
  4.    60 J
 Discuss Question
Answer: Option C. -> 45 J
Answer: (c).45 J
Question 324. What is the heating value of 10 Kg of coal with heat of combustion 10 J/Kg?
  1.    -10 J
  2.    10 J
  3.    -100 J
  4.    100 J
 Discuss Question
Answer: Option C. -> -100 J
Answer: (c).-100 J
Question 325. What is the value of higher heating value if the value of lower heating value is 10 J and the product has 5 mole of H₂O and Enthalpy of vaporization is 4 J/mole at standard conditions?
  1.    10 J
  2.    20 J
  3.    30 J
  4.    40 J
 Discuss Question
Answer: Option C. -> 30 J
Answer: (c).30 J
Question 326. What is the heating value of 2 Kg of coal with heat of combustion 15 J/Kg?
  1.    -15 J
  2.    15 J
  3.    -30 J
  4.    30 J
 Discuss Question
Answer: Option C. -> -30 J
Answer: (c).-30 J
Question 327. What is the difference between lower heating value and higher heating value if the product has 2 mole of H₂O and Enthalpy of vaporization is 40 J/mole at standard conditions?
  1.    -40 J
  2.    40 J
  3.    -80 J
  4.    80 J
 Discuss Question
Answer: Option C. -> -80 J
Answer: (c).-80 J
Question 328. What is the difference between higher heating value and lower heating value if the product has 5 mole of H₂O and Enthalpy of vaporization is 10 J/mole at standard conditions?
  1.    10 J
  2.    -10 J
  3.    50 J
  4.    -50 J
 Discuss Question
Answer: Option C. -> 50 J
Answer: (c).50 J
Question 329. What is the heat of reaction if enthalpy of inputs and outputs at 25°C are 10 J and 20 J, the enthalpy of input and outputs at given temperature are 25 J and 30 J, enthalpy change of reaction is 50 J?
  1.    45 J
  2.    50 J
  3.    55 J
  4.    60 J
 Discuss Question
Answer: Option C. -> 55 J
Answer: (c).55 J
Question 330. What is the sensible heat of a reaction if the enthalpy of outputs is 5 J, and enthalpy of inputs is 10 J?
  1.    -5 J
  2.    5 J
  3.    -10 J
  4.    10 J
 Discuss Question
Answer: Option A. -> -5 J
Answer: (a).-5 J

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