Chapter 6, Problem 6.116P

An elastic balloon behaves such that pressure is proportional to diameter and the balloon contains 0.5 kg air at 200 kPa and 300 The balloon is momentarily connected to an air line at 500 kPa and 1000C. 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.

steam at 11 MPa has a specific volume of 0.0196 m^3/kg , find the temperature, the enthalpy, and the internal energy.

An elastic balloon behaves such that pressure is proportional to diameter and the balloon contains 0.5 kg air at 200 kPa and 300 The balloon is momentarily connected to an air line at 500 kPa and 1000C. 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.  After that the air line is disconnected from the balloon and the air is   allowed to escape through an opening until the same initial pressure and   temperature. For this process, the balloon behaves such that pressure is   proportional to squire of diameter. Determine the final mass in the balloon and heat transfer during this process.

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)

A piston/cylinder has a water volume separated in VA = 0.3 m³ and VB = 0.4 m by a stiff membrane. The initial state in A is 1000 kPa, x = 0.8 and in B it is 1500 kPa and 250°C. Now the membrane ruptures and the water comes to a uniform state at 200°C. What is the final pressure? Find the work and the heat transfer in the process. Po mp cb A:H2O B:H20

A car or engine takes 2000 J of heat from a reservoir at 500 K, does some work, and discards some heat to a reservoir at 350 K. Find the total entropy change in the engine during one cycle

Find the quality and internal energy of steam at 700 kPa and enthalpy of 2600 kJ/kg.

Find the mass of water that can be cooled from 26°C to-10°C from a 20 tons refrigeration system for 14 hrs.

A piston/cylinder receives (control mass system) R-134a at 300 kPa and compresses it in a process where the entropy does not change. to a state of 1000 kPa, 60° C. Find the initial temperature, AND THE CHANGE IN INTERNAL ENERGY.