Chapter 7, Problem 7.142EP

For the statements in them, put T if they are true and F if they are false. a) ( ) An ideal gas expands freely from a volume V to a volume 2V. Then,this gas freely expands from 2V volume to 3V. In this case, it is not correct to state that theThe resulting change in entropy for these two expansions is equal to the change in entropy that would occur if the gas expanded freely from volume V to volume 3V.b) ( ) The Otto cycle is an idealization of engines in which expansion is so fast that it can be considered isothermal.c) ( ) No ideal engine has greater efficiency than one that has a cycle ofoperation between two isotherms and two adiabatic.d) ( ) A mixture of water and ice is in thermal equilibrium at a temperature of 273 K in an ideal calorimeter (adiabatic walls). A mass M of water at temperature T is added to the calorimeter, causing a part of the ice to melt until the thermal equilibrium is again reached at 273 K. Using c for heatspecific to water, we can state that the entropy…

A reciprocating compressor compresses air 1/8 th times of its initial volume. If the pressure of air beforecompression is 5 bar and volume of air after compression is .016m 3 , when the law followed is pv 1.6 =constant. Calculate the work done and draw the process on PV diagram.

Find the volume, the internal energy and the enthalpy of 2.5 kg of compressed liquid at 7.5 MPa and 215 C if the substance is water.