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A piston cylinder containing steam at 700 kPa at 250 degrees celcius undergoes a constant pressure process until the quality is 70%. Determine: a). Work done b). Heat transferred c). Change in internal energy d). Change in enthalpy NOTE: - INDICATE THE PV and TS DIAGRAM - INDICATE THE INITIAL AND FINAL STATE OF THE SUBSTANCE
Ans. (a) -101.4 kJ/kg (b) -810 kJ/kg (c) -708.5 kJ/kg (d) -810 kJ/kg
A steam engine isentropically expands 7.382 kg/sec of steam from 0.68 Mpa,
220°C, the exhaust is dry and saturated. Determine (a) the work of nonflow
process in kW and (b) the work of a steady flow process in kW. NOTE: - INDICATE THE HS and TS DIAGRAM - INDICATE THE INITIAL AND FINAL STATE OF THE SUBSTANCE
Water at 2.5 MPa and 200°C is heated at constant temperature up to a quality of 80%. Find (a) the quantity of heat received by the water, (b) the change in internal energy, and (c) the work of a nonflow process. NOTE: - INDICATE THE HS and TS DIAGRAM - INDICATE THE INITIAL AND FINAL STATE OF THE SUBSTANCE
Ans. (a) 2025.7 kJ/kg; (b) 1396.5 kJ/kg; (c) 629.17 kJ/kg
For each population, find the mean of the sampling distribution of the sample mean with an indicating sample size,n.
A.7,10,19,20 ; n=2
B.46,51,55,59,61 ; n=3
C.24,26,29,32,35 ; n=4
Write question tags for the following sentences. Notice carefully whether the statement is positive or negative in each case.
(10)
?
?
.?
i. It is raining cats and dogs,
ii. She does not take interest in Mathematics,
iii.You were ignorant of classical literature,
iv. She may attend a training session next week,.
V. The rate of illiteracy increases day by day,
Observe your father's daily activities closely for a few days and then write a brief and concise paragraph about his daily routine. You are required to use at least ten sequence markers appropriately to create a both cohesive and coherent
paragraph.
6.371 kg of water vapour are contained at 150 kPa ad 90 per cent quality in a
suitable enclosure. Calculate the heat which must be added in order to just
produce a saturated vapor. What will the pressure be at the end of the
heating process? NOTE: - INDICATE THE HS and TS DIAGRAM - INDICATE THE INITIAL AND FINAL STATE OF THE SUBSTANCE
6.86 kg of water vapour are contained at 150 kPa ad 90 per cent quality in a
suitable enclosure. Calculate the heat which must be added in order to just
produce a saturated vapor. What will the pressure be at the end of the
heating process? NOTE: - INDICATE THE HS and TS DIAGRAM - INDICATE THE INITIAL AND FINAL STATE OF THE SUBSTANCE
0.5 kg aluminium block is heated to 1000C and quickly placed into a beaker which contains water at 400C. If the final temperature of the system is 440C and specific heat of aluminium is 900 J/kg0C, calculate the mass of water
How much heat (kJ) is required to convert 50 grams of ethanol into its vapor or gaseous form? How much heat is released if the same amount of vaporized ethanol is available to return to its liquid form?
#339914 on Dec 2023