Chemical Engineering Thermodynamics

201. Heat of reaction at constant volume is identified with _________ change.

1. Enthalpy
2. Internal energy
3. Either (A) or (B)
4. Neither (A) nor (B)

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202. Heat pump

1. Accomplishes only space heating in winter
2. Accomplishes only space cooling in summer
3. Accomplishes both (A) and (B)
4. Works on Carnot cycle

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203. Heat requirement for decomposition of a compound into its elements is _________ that is evolved during the formation of that compound from its elements.

1. The same
2. Less than
3. Greater than
4. Different than

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204. Heating of water under atmospheric pressure is an _________ process.

1. Isochoric
2. Isobaric
3. Adiabatic
4. Isothermal

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205. Helmholtz free energy (A) is defined as

1. A = H - TS
2. A = E - TS
3. A = H + TS
4. None of these

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206. Henry's law is closely obeyed by a gas, when its _________ is extremely high.

1. Pressure
2. Solubility
3. Temperature
4. None of these

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207. High _________ is an undesirable property for a good refrigerant.

1. Specific heat
2. Latent heat of vaporisation
3. Viscosity
4. Specific vapor volume

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208. High pressure steam is expanded adiabatically and reversibly through a well insulated turbine, which produces some shaft work. If the enthalpy change and entropy change across the turbine are represented by ΔH and ΔS respectively for this process:

1. Δ H = 0 and ΔS = 0
2. Δ H ≠ 0 and ΔS = 0
3. Δ H ≠ 0 and ΔS ≠ 0
4. Δ H = 0 and ΔS ≠ 0

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209. Ideal gas law is applicable at

1. Low T, low P
2. High T, high P
3. Low T, high P
4. High T, low P

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210. Ideal refrigeration cycle is

1. Same as Carnot cycle
2. Same as reverse Carnot cycle
3. Dependent on the refrigerant's properties
4. The least efficient of all refrigeration processes

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