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1: Steam at 100°C is passed into a condenser at a rate of 500 kg/h and leaves as water at 60°C. If the condenser is supplied with cooling water which enters at 20°C and leaves at 40°C, calculate:
a) how much heat per hour is extracted from the steam.
b) how much cooling water is needed per hour.
2: A cupola furnace is charged with 100 kg of aluminium to be used for casting small components. The melting point of aluminium is 657°C, its specific heat capacity is 924 J/kg °C and its latent heat of fusion is 322 kJ/kg.
Calculate the total heat energy which must be supplied to melt the aluminium if its initial temperature is 20°C.
A beaker filled with an equimolar liquid mixture of ethyl alcohol and ethyl acetate evaporates at O°C into still air at 101 kPa (1 atm) total pressure. Assuming Raoult's law applies, what will be the composition of the liquid remaining when half t..
The enthalpy change of reaction for the balanced equation (with lowest whole-number coefficients) is H 67.7 kJ. If 2.50 102 mL of N2(g) at 100.C and 3.50 atm and 4.50 102 mL of O2(g) at 100.C and 3.50 atm are mixed, what amount of heat is..
A mixture of 65 mol% methane, 30 mol% hydrogen, and 5 mol% nitrogen is burned to heat a boiler used to produce hot steam. The ratio of CO2 to CO in the exhaust gas is 10:1. If 30% excess air is supplied, determine the concentration of the exhaust g..
This is a fluid dynamics experiment involving the filling and emptying of tanks. The objectives of the experiment include: Determination of the discharge coefficient of the orifice and the equivalent length of a pipe mounted at the outlet of the two..
Select suitable valve types for the following applications: a. Isolating a heat exchanger. b. Manual control of the water flow into a tank used for making up batches of sodium hydroxide solution.
Evaluate the stability using Rouths Hurwartz criterion and obtain the range of K value for the stability under various controllers and evaluate the relative stability of the system with P and I controllers.
a distillation column fig. 1 separates 4500 kghr of a 40 benzene 60 chlorobenzene liquid mixture at 20oc. the liquid
Consider 1 mole of ideal gas at 1 bar and 300 K, which of the following statements is true? The absolute entropy of the system is negative. Helium (m=4 amu) will have a larger entropy than argon (m=40 amu).
question 1a what are the four significant physical parameters that you would use to assess the thermal comfort of
What is the reason that reactor would be designed to consume so little of the reactant in production of ethanol from ethylene?
The fluoride mixture is then enriched through a multistage diffusion process to produce a 3% 235U nuclear fuel. The diffusion process utilizes Graham's law of effusion (see Chapter 5, Section 5.7). Explain how Graham's law of effusion allows natur..
Algae grown in water containing some 18O (in H2 18O) evolve oxygen gas with the same isotopic composition as the oxygen in the water. When algae growing in water containing only 16O were furnished carbon dioxide containing 18O, no 18O was found to..
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