Using the steam table, determine the enthalpy change of 1 kg of water for each of the following cases. (a) Heating water from 20 ° C to 125 ° C without undergoing phase change? ΔH = Answer kJ / kg (b) Heating liquid water from 20 ° C to 125 ° C and evaporating at 125 ° C and 232.1 kPa? ΔH = Answer kJ / kg (c) Cooling and condensation of saturated vapor at 100 ° C and 1 atm abs to liquid at 35 ° C? ΔH = Answer kJ / kg (d) Condensation of saturated vapor at 130 ° C and 270.1 kPa. ? ΔH = Answer kJ / kg

Q: Calculate the specific enthalpy of saturated liquid-vapour water at 25°C for a quality of x=87.1%.…

A: Saturated liquid-vapor waterT = 25 oCx = 87.1% =0.871hf = 104.89 kJ kg-1 = 104.89 kJ/kghg = 2442.3…

Q: Air initially at 101.325 kPa, 30°C db and 40% relative humidity undergoes an adiabatic saturation…

A: The increase in the water content of the moist air is m.water = 0.246 kg/s.

Q: Determine the enthalpy change Ah of carbon monoxide, in kJ/kg, as it is heated from 300K to 1000 K,…

A: Note: As per the policy, we can solve the first three subparts. Please resubmit the remaining part.

Q: A 2 kg of air at 24.55 C underwent a polytropic process (n = 1.5) wherein its initial pressure of…

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Q: A refrigerant of a certain thermodynamic cycle at a point during the evaporation process where its…

A: Given data :- dryness friction = 50 % latent heat = 211.3 kJ/kg enthalpy of saturated liquid = 190.7…

Q: 2.74 kg of air at 1.44 m3 underwent an isothermal process wherein its initial pressure of 52.31 kPa…

A: Given Data m=2.74 kg V1=1.44 m3 Isothermal process P2=2P1

Q: A 2.83 kg of air at 21.34 C underwent an isentropic process wherein its initial pressure of 50.53…

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Q: An insulated rigid tank is divided into two compartments by a partition. One compartment contains 7…

A: Energy balance   ∆U=0mcvTm-T1O2+mcvTm-T1N2=0Tm=4×0.743×293+7×0.658×3134×0.743+7×0.658=305.2 K The…

Q: A rigid tank that contains 4.4 kg of N₂ at 25°C and 550 kPa is connected to another rigid tank that…

A: (1) To find: The volume of the N2 tank. Given: The mass of N2 is m1=4.4 kg. The pressure in N2 tank…

Q: An air conditioning unit supplies cold air to a room at 22°C dry bulb and 70% relative humidity.…

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Q: A 2 kg of air at 20.2 C underwent a polytropic process (n = 1.5) wherein its initial pressure of…

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Q: A rigid tank that contains 5.2 kg of N2 at 25°C and 550 kPa is connected to another rigid tank that…

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Q: (a) A piston-cylinder device (2 m) initially contains water at 300 kPa with 60% quality. Heat is…

A: Note: Since you have asked multiple question, we will solve the first question for you. If you want…

Q: 9.92 kg of R-134a at 300 kPa fills a rigid container whose volume is 14 L Determine the temperature…

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Q: A mixture of hydrocarbon gases is composed of 60 percent methane, 25 percent propane, and 15 percent…

A: Given data is

Q: In the preparation of ideal-gas tables, 0 K is chosen as the reference temperature.

A: The given statement i.e, "In the preparation of ideal-gas tables, 0 K is chosen as the reference…

Q: A mixture of 1.6 kg of N2 (Cp=1.049 kJ/kg.K) and 0.75 kg of H2 (CP3D14.501 kJ/kg.K) is contained in…

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Q: n an air-conditioning unit 3.5 m3/s of air at 27 °C dry-bulb temperature, 50 percent relative…

A:

Q: 3. A piston-cylinder device contains a mixture of 0.5 kg of H2 and 1.2 kg of N2 at 100 kPa and 300…

A: According to the information we have The mixture of piston cylinders consists of a combination with…

Q: 13–38 A rigid tank that contains 1 kg of N, at 25°C and 300 kPa is connected to another rigid tank…

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Q: Using the steam table, determine the enthalpy change of 1 kg of water for each of the following…

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Q: 15. A steam supply at 1.5MPA is formed from a mixture of steam at 1.5MPA and dryness fraction 0.9…

A: Steam is available at, State 1 (1.5MPa and dryness fraction, x=0.9) State 2 (1.5MPa and Temperature,…

Q: A 2.60 kg of air at 23.69 C underwent an isentropic process wherein its initial pressure of 50.88…

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Q: A 2.59 kg of air at 1.91 m3 underwent an isothermal process wherein its initial pressure of 52.01…

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Q: A 2.74 kg of air at 1.44 m3 underwent an isothermal process wherein its initial pressure of 52.31…

A:

Q: Using the steam tables, determine the enthalpy change for 1 lb water for each of the following…

A: “Since you have posted a question with multiple sub parts, we will provide the solution only to the…

Q: ir enters a cooling section at 97 kPa, 35°C, and 30 percent relative humidity m'/min, where it is…

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Q: This question requires the use of the Thermodynamic Property Tables supplied as additional material.…

A: The initial mass of liquid water, initial mass of steam, initial pressure, final temperature,

Q: Problem 4 (+ 3 kg of oxygen is sealed in a rigid container at 150°C and 250 kPa. The gas is heated…

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Q: ure at 21

A: given:

Q: A mixture of gases expands from 0.03 m to 0.06 m at a constant pressure of 1 MPa and absorbs 84 kJ…

A: Initial volume = 0.03 m3 Final volume = 0.06 m3 Heat absorbed = 84 kJ Answer is (b) 54 kJ

Q: B. An 70 L vessel contains 3.5 kg of refrigerant-134a at a pressure of 0.14 MPa. Determine: (a) the…

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Q: An equimolar mixture of helium and argon gases is to be used as the working fluid in a closed-loop…

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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.