A Styrofoam coffee cup contains 125 g of hot coffee at 95.0 oC. A 25.0-g ice cube at -20.0 oC is dropped into the hot coffee. After the ice melts and thermal equilibrium is reached, the resulting liquid has a temperature of 65.0 oC. The specific heat capacity of ice is 1.99 J g-1 oC-1 and that of water is 4.184 J g-1 oC-1. The heat capacity of the coffee cup is 15.0 J oC-1. Calculate the molar heat of fusion for water. Assume the coffee is essentially pure water (FW 18.015) and that no heat enters or escapes from the system.

Q: A cylinder contains 1.2 moles of ideal gas, initially at a temperature of 117°C. The cylinder is…

A: Given data:The number of moles of an ideal gas is n = 1.2The initial temperature of the gas is Ti =…

Q: 10 lbm of ammonia (MW = 17), is heated inside a cylinder equipped with a piston. The initial…

A: Draw the P-V diagram and the T-S diagram. Here, 1 is the initial state of the system and 2 is the…

Q: 7. At a certain process, the specific heat at polytropic process of air is 0.3075kJ/kg- k. Under the…

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Q: 100-kg of R-134a at 200 kPa are contained in a piston cylinder device whose volume is 12.322 m². The…

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Q: (5) A spring-loaded piston-cylinder device is filled with 4 kg of steam at 2.5 MPa and 250°C.…

A: Given that, Mass of the steam, m=4 kg,Initial pressure of water, P1=2.5 MPa,temperature of water,…

Q: 0.03-m of air is contained in the spring-loaded piston-cylinder device shown in Fig. P4-53. The…

A: Given: The initial volume of the air, V1 = 0.03 m^3 The final volume of the air, V2 = V1/2 = 0.015…

Q: A cylinder contains a monoatomic ideal gas (17 moles) of volume 0.1 m and at a temperature of 30.8…

A: Given: V1 = 0.1 m3 , n = 17 moles, T1 = 30.8oC =303.95 K mass of piston; m=2.1kg area of piston; A =…

Q: 2. 5.0 kg of steam at 0.7 MPa and 250°C enters a pipeline and flows steadily along it at constant…

A: The enthalpy of the superheated steam at the pressure of 0.7 MPa and temperature 250oC. h1=2950…

Q: Determine the change in internal energy for a 6cm cube of iron with a mass of 1.7kg as it is heated…

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

Q: 24. A gas is transferred to an empty 0.7m cylinder until the pressure reaches 9MPaa. The temperature…

A: Option c is correct.

Q: HOTE 7 LIT UAD CAME 1.9 A mass of gas at an initial pressure of 28 bar, and with an internal energy…

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Q: An ideal gas with γ= 1.40 occupies 8.26 L at 335 K and 59.2 Kpa pressure. It’s compressed…

A: Given data:

Q: 100 grams of R-134a initially fill a weighted piston cylinder device at 60 kPa and -20°C. The device…

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Q: A rigid tank initially contains 2 kg of water at 100 C and 60 percent quality. The water is stirred…

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Q: A well-insulated copper tank with a mass of 13 kg contains 4 kg of liquid water. Initially,…

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Q: A 1 kg block of ice at 0° C is placed into a perfectly insulated, sealed container that has 2 kg of…

A: A 1 kg block of ice at 0° C is placed into a perfectly insulated, sealed container that has 2 kg of…

Q: A 5-kg saturated liquid water contained in a piston-cylinder arrangement at 200 kPa is heated by…

A: In the above question, it is clearly seen that the water is at the saturated state. Half of its mass…

Q: 3. 5.0 kg of steam at 0.7 MPa and 250°C enters a pipeline and flows steadily along it at constant…

A:

Q: constant volume vessel contains 3 m3 of hydrogen gas at 250 kPa pressure and 550 K temperature. The…

A: Given Data !V = 3m3 = constantP1=250kPaT1 = 550 K ,     T2 = 350KR = 4.124 kJ/kg KCv = 10.377 kJ/kg…

Q: A piston–cylinder device contains 4 kg of argon at 250 kPa and 35°C. During a quasi-equilibrium,…

A: Given data: The mass of the argon is m=4 kg The pressure of the argon is P=250 kPa The temperature…

Q: A gas is transferred to an empty 0.7m3 cylinder until the pressure reaches 9MPaa. The temperature of…

A: Given question belongs to subject Engineering thermodynamics. Which can be solved by Ideal-Gas…

Q: A piston-cylinder device initially contains 500 liters of liquid water at 2.5 Mpaa and 200°C. Heat…

A:

Q: Nitrogen (N2) at 100C and 600 kPa expands in such a way that it can be approximated by a…

A: Initial State 1, T1 = 100 oC = 373 K P1 = 600 kPa Final State P2 = 100 kPa R = 0.297 kJ/kgK Cv =…

Q: A closed vertical cylinder containing 0.3 kg of nitrogen at 90°C is fitted with a weighted,…

A: Write the given data with suitable variables: m=0.3 kgP=275 kPaT1=90 °CT2=180 °CQ=20 kJcp=1.04…

Q: Two kilograms of water is contained in a piston-cylinder device where a linear spring is attached to…

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Q: Air must be compressed in a well-insulated piston cylinder from a volume of 6.4 litres to a volume…

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Q: Steam at 100°C is condensed into a 62.0 g steel calorimeter cup containing 200 g of water at 29.0°C.…

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Q: A glass of water with a mass of 0.45 kg at 20°C is to be cooled to 0°C by dropping ice cubes at 0°C…

A:

Q: An iron block of unknown mass at 185°F is dropped into an insulated tank that contains 0.8 ft3 of…

A: Given: The temperature of the iron block is T1=185°F. The volume of the water is V=0.8 ft3. The…

Q: A mass of 0.1 kg of helium fills a 0.2 m³ rigid vessel at 350 kPa. The vessel is heated until the…

A: Given:-Mass m=0.1 kg             Volume V1=0.2m3     As  vessel is rigid  hence V1=V2=0.2m3…

Q: Q3: A titanium ball (k=20 W/m °C, a=7.1x10-6 m²/s, p=4450 kg/m³, Cp=633 J/kg °C) having a diameter…

A: Given, Properties of titanium ball; k=20 W/(m°C), α=7.1×10-6  m2/s, ρ=4450 kg/m3, Cp=633 J/(kg°C)…

Q: Saturated steam at 99.6 °C is heated to 350°C. Use the steam table provided to determine: a. The…

A:

Q: A mass of ice at -7 OC is needed to cool 124 kg of vegetables (Cp = 3.35 KJ /kg.K )in a bunker for…

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Q: The volume of a monatomic ideal gas doubles in an adiabatic expansion. By what factor do (a) the…

A: Given: Monoatomic ideal gas Adiabatic expansion V2=2V1 To determine: At what factor Temperature and…

Q: The initial volume of gas 0.59 m³ and pressure 4.5 bar is compressed until its volume 0.15 m3. The…

A: Write the given data. V1=0.59 m3P1=4.5 bar=4.5×105 N/m2V2=0.15 m3

Q: In a fixed volume container with a volume of 0.1 m^3, initially there is saturated water vapor at…

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Q: There is an 500g container made out of aluminum holding 300g of water. The Water and Aluminum have…

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Q: A rigid tank contains 2.0 kg of nitrogen at 100 K and ? = 0.50. Then, 0.5 kg of nitrogen is removed…

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Q: (1) Water that has an initial volume of 140 L at 70°C with a quality of 28 percent is contained in a…

A: Given that, Initial volume of water, V=140 L,Temperature of water, T1=70 °C,Quality of mixture, x=28…

Q: A large punch bowl holds 3.99 kg of lemonade (which is essentially water) at 20.5 °C. A 0.0550-kg…

A: The mass of the lemonade (water) is, mw=3.99 kg. The initial temperature of the lemonade (water) is,…

Q: 1. A closed vertical cylinder containing 0.3 kg of nitrogen at 90 °C is fitted with a weighted,…

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Q: (1)Water that has an initial volume of 380 L at 120°C with a quality of 42 percent is contained in a…

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Q: 200 kg Carbonated drink, initially at standard temperature and pressure is later stored in a…

A: Given data: The mass of the carbonated drink is m=200 kg The pressure in the container is P=93…

Q: A piston-cylinder containing steam at 700 kPa and 250o C undergoes a constant pressure process until…

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Q: ordinary egg can be approximated as a 5.5-cm-diameter sphere. The egg is initially at a uniform…

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Q: 27.259 kg per second of water at 0.03398675 kbarg and internal energy of 15000 kW is heated at…

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Q: Awatermelon initially at 35°C s to be cooled by dropping it into a lake at 15 °C. After 4 h and 40…

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Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.