Chapter 5, Problem 5.13CU

Temperature is an extensive property. True or False? Explain.

As shown on the right, a vertical piston–cylinder assembly containing a gas is placed on a hot plate. The piston initially rests on the stops. With the onset of heating, the gas pressure increases. At what pressure, in bar, does the piston start rising? The piston moves smoothly in the cylinder and g = 9.81 m/s2.

In order to investigate Boyle's law, the Polytropic process done in the experiment is: Select one: a. Expansion of oil. b. Isometric expansion of air. c. Isothermal expansion of oil. d. Isothermal expansion of air.

A system consisting of a power cycle and a heat pump cycle, each operating between hot and cold reservoirs whose temperature are 500 K and 300 K, respectively. All energy transfers are positive in the directions of the arrows. The accompanying table provides two sets of steady-state data, in kW. For each set of data, determine if the system is operating in accord with the first and second laws of thermodynamics. Power cycle QHQc W cycle (a) 60 40 20 (b) 120 80 40 Heat pump cycle QHQ'cW'cycle 60 20 80 20 80 100 Power cycle- Hot reservoir, TH= 500 K O'H J Qc o'c Cold reservoir, Te= 300 K W cycle Heat pump

On the Kelvin scale, a temperature of 27 °C has a corresponding value of

Describe the operation of thermodynamic systems and their properties

P1.1 Identify the thermodynamic systems that may be useful in the analysis of the following physical situations. Draw the appropriate boundaries and describe the type of system, the nature of the boundary, and the type of interactions that occur between the system and its surroundings. (i) A hot block of metal cooling at the bottom of a tank of water. (ii) Current flowing through a section of an insulated electrical cable. (iii) Water filling a storage tank from its bottom.

1. One pound of an ideal gas undergoes an isentropic process from 95.3psig and a volume of 0.6ft3 to a final volume of 3.6 ft3. If cp = 0.124Btu/lb-R and cv = 0.093 Btu/lb-R, determine the final temperature of the gas (°F) and the work done by the gas (Btu). Draw a figure, or graph that will support the problem. Explain each step by step formula.

3 kg of steam with a quality of 30% has a pressure of 12.056 bar. At that pressure, the specific volume of a saturated fluid is vf= 1.5289 cm^3/g. The specific volume of a standard vaporizes vg= 14.1889 cm^3/g. What is the specific volume of the steam?