III B.Tech I Semester Supplementary Examinations, November 2006 CHEMICAL ENGINEERING AND THERMODYNAMICS-II (Chemical Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ?????
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1. A reversible engine operating between a reservoir at 600 K and the ambient atmosphere at 300 K drives a refrigerator operating between 240 K and the ambient atmosphere. Determine the ratio of energy rejected by both the devices to the ambient atmosphere to the energy absorbed by the engine from the reservoir at 600K.
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2. (a) Carnot refrigerator operates between -23o C and 37o C. Calculate the COP of the refrigerator. (b) Name three types of reversible process.
3. (a) Define the terms giving a suitable example of each of them : System, Closed System, Open System, Extensive Property, Intensive Property and Partial Molar Property. (b) For a system of definite composition, show that n1 dG1 + n2 dG2 + − − − − − − ni dGi + − − − − − = 0 (c) Explain the physical significance of partial molar property.
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4. Discuss the enthalpy-concentration diagrams. What are the assumptions made in plotting these curves? Explain their utility and advantages. Discuss the effect of temperature and variation of these curves. 5. Determine expressions for G, H, S implied by the vander waals equation of state.
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6. For the system chloroform (1) - ethanol (2) having 75 mole percent chloroform, the following data is available t = 55C, P 1Sat = 82.5 kP a; P 2Sat = 37.5 kP a second virial coefficients: B11 =-963 cu.cm/mol, B22 = −1523 CC/mol; B12 = 52 CC/mol Calculate the residual properties - volume, enthalpy & entropy.
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7. Suppose that the adsorbate equation of state is given by z = (1 − βn)−1 , where β is function of T only. Find the implied adsorption isotherm and show under what conditions it reduces to the Langumir isotherm. 8. For the gas phase reaction CO2 (g)+H2 (g) ⇔ CH4 OH (g) at 10000 C and at 500 bar pressure, calculate the equilibrium composition using the following data: K=0.68 at 10000 C.; The fugacity coefficients at this pressure: CO2 =0.99; H2 =1.15; CO=1.08; H2 O=0.86. ????? 1 of 1
NR310802 III B.Tech I Semester Supplementary Examinations ...
A reversible engine operating between a reservoir at 600 K and the ambient at- · mosphere at ... Determine the ratio of energy rejected by both the devices to the.
critical solution temperatures and the three phase temperature for a partially mis- cible liquid ... 20 MPa. Estimate the degree of conversion (K = 1.96 Ã 10â4). 8.
critical solution temperatures and the three phase temperature for a partially mis- ... For the system diethy1 ketone (1) ? n-hexane(2), the Margules parameters ...
(b) The ground water level in a deposit of fine sand is 1.5 m below ground level. Above the water table ... is 21 kN/m3. Calculate the total stress, the neutral stress.
(b) Explain the following particle size measurement techniques. i. Sedimentation ... compaction. [6]. (b) Define Sintering and how is it different from hot pressing.
III B.Tech I Semester Supplementary Examinations, November 2005. AERO SPACE ... (b) Maximum energy theory. [16] ... plain with live examples. (b) Write a ...
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III B.Tech I Semester Supplementary Examinations, November 2005. POWER ELECTRONICS · (Electrical & Electronic Engineering) · Time: 3 hours · Max Marks: 80 · Answer any FIVE Questions · All Questions carry equal marks · ***** · 1. (a) Explain the oper
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i. plain carbon steel with 4% carbon and 0.8% manganese, ... (a) It is required to design a square key for fixing a gear on a shaft of 30 mm · diameter; to transmit ...
TECHNIQUES OF METAL JOINING · (Metallurgy & Material Technology) · Time: 3 hours · Max Marks: 80 · Answer any FIVE Questions · All Questions carry equal ...
Figure 1 shows two views of a tripod bracket. All connections are pinned. Find · the forces in magnitude and nature in the three memebers due to a vertical load ...
