Chapter 7, Problem 7.114P

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.

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.

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

3kg of Co2 expanded in a stationary piston cylinder through a polytropic process from 30 degree Celsius and 250 kpa to 100kPa pressure. If the polytropic exponent, n = 1.45, find the total work, total heat transferred, total kinetic energy change and internal energy change

An amount of 4000 BTU of heat is transferred from a reservoir at 800 deg. F to a reservoir at 200 deg. F. Find the entropy change of the system.

Two rigid tanks are filled with water. Tank A is 0.2 m³ at 100 kPa, 150°C and tank B is 0.3 m³ at saturated vapor 300 kPa. The tanks are connected by a pipe with a closed valve. We open the valve and let all the water come to a single uniform state while we transfer enough heat to have a final pressure of 300 kPa. Give the two property values that determine the final state and find the heat transfer. B A

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.

Please show your complete solution. Thank you! During the reversible process executed by the non-flow system, the pressure increases 334.79 kPa to 1378.96 kPa in accordance with PV=C and the internal energy increase is 22, 577 J, the initial volume is 85 liters. Find the heat.

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