Molecular Physics | Thermodynamics Answers

Heat supplied to raise steam in the boiler is 3000 KJ/kg while heat rejected by the system to

the cooling water in the condenser is 2000 KJ/kg. The turbine develops power of 1500 KW and

the work required to pump the condensate back into the boiler is 50 KW. Find the steam mass

flow rate.

under a pressure of 14nm-2, some air has a volume of 1.5m3. determine its volume when its pressure is 10nm-2. assuming the temperature is kept constant

how much heat is given out when 50g of steam at 1000c cool to water at 280c? (specific latent heat of vaporization of water =2.3x106jkg-1)

Some hydrogen gas has a volume of 200cm3 at 150c. If the pressure remain constant at what temperature will its volume be 150cm3?

Find the Reynolds number if a fluid of viscosity 0.4 Ns/m2 and relative density of 900 kg/m3

through a 20 mm pipe with a velocity of 2.5 m/s. Is the flow Laminar or Turbulent?

Note: If Reynolds < 2000 the flow is laminar

If Reynolds > 4000 the flow is turbulent

If 2000 < Re < 4000 it is transitional flow

Re =

At what temperature on the Fahrenheit scale will the temperature on a centigrade scale be

three times that on a Fahrenheit scale?

150g of ice at 0°c is mixed with 300g of water at 50°c.calculate the temperature of the mixture.Take specific heat capacity of water as 4.2×10^3J/Kg/k (specific latent heat of fussion of ice as 3.34×10^5J/Kg/k

Some hydrogen gas has a volume of 200cm3 at 150c. If the pressure remain constant at what temperature will its volume be 150cm3?

An iron rail is 20m long. How much will it expand when heated from 100c to 500c (linear expansivity of Iron = 1.2x10-5 0c-1)

We want to condense 1 kg of water vapour at 100 c to a temperature of -5 c (Ice). How much heat should be removed?