Chapter 6, Problem 6.130EP

8.5kg/s of of air are compressed isothermally from 90kPa 8m3/s to 600kPa. If the Initial and final velocity of the gas is 15m/s and 50m/s with negligible changes in potential energy, Find the Work steady flow(kW)

A nozzle is a device for measuring the velocity of flow. At inlet to a nozzle the enthalpy is 3026 kJ/k, the velocity is 60 m/s. At exit from the nozzle the enthalpy is 2790 kJ/kg. The nozzle is horizontal and there is a negligible heat loss from the nozzle. Find he velocity at nozzle exit The inlet area is 0.1 m2 and the specific volume at the inlet is 0.19 m²/s, find the mass flow rate • f the specific volume at the nozzle exit is 0.5 m²/kg, find the exit area of the nozzle (688m/s) (0.36kg/s) (0.0299m2) Air and fuel enter a furnace used for home heating. The air has an enthalpy of 320 kJ/kg and the fuel has an enthalpy of 43027 kJ/kg. The gases leaving the furnace has an enthalpy of 616 kJ/kg. There are 17 kgair / kgfuel, water circulated through the wall furnace receiving heat. The hose required 17.02 kW of heat, what is the fuel consumption per day. (41 kg/day)

8: A small metallic object of 5 kg mass and at a temperature of is thrown in a tank of water at temperature. Calculate change in entropy of the universe.

L An iniially empty bottle is illed with water from a line at 0.8 MPa and 350-C. Assume that there is no heat transfer and that the bottle is closed when the pressure reaches the line pressure, If the final mass is 0.7 kg, find the final temperature and the volume of the botle.

(a) An elastic balloon behaves such that pressure is proportional to diameter and the balloon contains 0.5 kg air at 200 kPa and 30°C. The balloon is momentarily connected to an air line at 500 kPa and 100°C. Air is let in until the volume doubles, during which process there is a heat transfer of 50 kJ out of the balloon. Find the final temperature and the mass of air that enters the balloon.

o At the inlet to a certain nozzle, the enthalpy of the gas is 3000 kJ/kg and velocity is negligible. At the discharge end of the nozzle, the enthalpy is 2762 kJ/kg. The nozzle is horizontal and flow through the nozzle is adiabatic find the velocity of gas at the nozzle exit.

A certain quantity of air in a closed vessel with a fixed volume of 0.15 m3 exerts 1 MPa pressure at 500 K. If the vessel is cooled while the pressure is reduced to 350 kPa, find the steady-flow work during the process

5 kg of air at 1300 K and 6 bar is expanded isentropically to 2 bar. Find the outlet temperature,inlet and outlet volume, specific work, total work, and change in entropy due to the expansion.   clear writing please

Calculate the workdone, heat transfer and change in entropy.  Do not need to solve.  I just need the  steps to solve it e.g equations etc.