A mass of 1.37 kg of air in a piston-cylinder device is heated from 20.6°C to 250.1°C. During the process, the pressure inside the cylinder is held constant at 111.04 kPa. The gas constant of air and the isentropic index are given as 0.277 kJ/kg.K and 1.2, respectively. Determine the boundary work. [write your answer in J and use 2 digits after the decimal point]. Answer:

Q: Gas at 70 bars gage pressure and 37.8°C is contained in a 12,900-cm3 cylinder. A piston compresses…

A: The gas gage pressure is = 70 barAtmospheric pressure is = 1.01325 barThe temperature is T1=37.8…

Q: takes 675 J of work to compress quasi- culate the temperature

A: we have to determine the temperature of a isothermal system undergoing compression

Q: Initially, a rigid tank contains 500L of water at 300°C. By volume, the tank contains60% liquid and…

A:

Q: Consider a polytropic process with argon, where n=1.67. The final temperature is 375 Kand the final…

A: Given data,       process is  polytropic   n=1.67.       Final  temperature=375 K.       Final…

Q: 3. A room is to be heated by 1000 kg of a liquid contained in a tank placed in the room. The room is…

A: The mass of the liquid is m=1000 kg The final temperature of the liquid is Tf=25°C=298 K The heat…

Q: Shown in the figure, an insulated rigid tank is divided into two equal parts by a partition.…

A: Giveninsulated tankm=4kgP1=600kPaT1=300KR=0.287 kJ/kgKCv=0.7180 kJ/kgK∆U=mCvT2-T1

Q: 20-2 An ideal gas undergoes the thermodynamic process shown in the PV 2P,: diagram in the figure.…

A: Initial and final temperatures can be determined by using ideal gas equation As temperature is…

Q: The temperature of 1.9 kg of water is 100.0°C, but the water is not boiling, because the external…

A:

Q: Steam is contained in a 2-L volume at a pressure of 2.0 MPa and a temperature of 400°C. If the…

A: Givenvolume of the steam v=2ltr=2×10-3 m3pressure, P=2MPatemperature T=400oCheat added Q=20kJ

Q: 169 g of solid water (i.e. ice), at -17 °C, is placed into a sealed, insulated container with a…

A: The step by step solution is mentioned below

Q: (a.) What is the relationship between power, P (in watts) and work, W (in joules)? What is the…

A:

Q: Initially, a rigid tank contains 50OL of water at 300°C. By volume, the tank contains60% liquid and…

A:

Q: A 1.76-m³ rigid tank contains steam at 220°C. One-third of the volume is in the liquid phase and the…

A: V=1.76 m3 T=220oc Vf=13V Vg=23V To find: the quality of the mixture,x.

Q: According to newton’s law of cooling, the rate at which a substance cools in air is directly…

A: Write the given values with the suitable variables. T0=30 °FT1=100 °FT2=75 °Ft1=15 minTi=80 °FTf=35…

Q: Plot DSa and DSw as functions of Tw on a single graph. Plot DSsys [DSsys = DSa +DSw] as functions of…

A: the graphs are in last two pages i solved whole question

Properties of Pure Substances

A substance with fixed chemical composition throughout is called a pure substance like water, air, and nitrogen. A pure substance does not have to be a single element or compound. A mixture of two or more phases of a pure substance is also a pure substance as long as the chemical composition is the same for all phases. These substances mainly have a constant/ uniform composition. The substances also have fixed boiling and melting points. A pure substance takes part in a chemical reaction to form predictable products.