138 kg of water is started with a temperature of 304.48 K. It is allowed to...
The amount of boiling water required to raise the temperature of 25.0 kg of water in the bath to body temperature is 4.80 kg. In this process, the heat lost by the boiling water is equal to the heat gained by the room- temperature water. How much heat was transferred in this process? Express your answer to four significant figures and include the appropriate units.
5 kg of water substance at 1 bar, 400 K, contained in a piston-cylinder apparatus, is compressed to 10 bar, with heat transfer to a reservoir maintained at 350 K; the temperature of the water substance remains constant at 400 K. If the initial and final specific entropies of the water substance are: 7.502 kJ/kg-K and 1.600 kJ/kg-K respectively; (a)How much heat is removed? (b)What is the entropy change of the water substance? (c)What is the entropy change of the...
302.2 kg of ice is melted into water then raised to a temperture of 347.9 K. How much energy is needed to complete this process? Answer: Check
A block of ice, mass 2.16 kg and initial temperature of -8 oC, is placed in an insulating container. 3.12 kg of water at temperature 24 oC, is added to the container. The water and ice exchange heat, but no other heat flows into or out of the container. In the process of the water and ice reaching equilibrium, how much ice melts? Give your answer in kg to three digits. Note: It is possible that the answer is zero.
4) A container has 7.0 kg of water in it. If 263.0 k] of heat is added to the system and it does 94.0 kJ of 4) work on its surroundings, how much does its temperature change? (The specific heat of water is 4184 J/kg K.) A) 5.8 K B) 0.16 K C) 0.0058 K D) 170 K
1. How much heat is needed to raise the temperature of 3 kg of water from 20oC to 40oC? Give answer in kJ (1kJ = 1000 J) (round answer to 3 sig fig) 2. How much heat is needed to raise the temperature of 3 kg of ice from -40oC to -20oC? (round answer to 3 sig fig) Specific heat of water: C = 4180 J/kgK Specific heat of ice: C = 2090 J/kgK Specific heat of ethanol: C= 2440...
At 1 atm, how much energy is required to heat 0.0550 kg of ice at -22.0 °C to steam at 129.0 °C? STRATEGY 1. Calculate the energy needed for each temperature change or phase change individually. A. The energy needed to heat 0.0550 kg of ice from -22.0 C to its melting point. B. The energy needed to melt 0.0550 kg of ice at its melting point C. The energy needed to heat 0.0550 kg of liquid water from the...
A block of ice, mass 3.21 kg and initial temperature of -15 oC, is placed in an insulating container. 3.22 kg of water at temperature 25 oC, is added to the container. The water and ice exchange heat, but no other heat flows into or out of the container. In the process of the water and ice reaching equilibrium, how much ice melts? Give your answer in kg to three digits.
s Q. Find the entropy and/or temperature of steam at the following states Region k/kg K) 5 MPa 1 MPa 18 MPa 400°C 40 kPa 40 kPa 120°C 50°C Quality, x-09, Mixed 71794 (<7.6700) Q. Determine the entropy change of water contained in a closed system as it changes phase rom saturated liquid to saturated vapor when the pressure is 0.1MPa and constant Why is the entropy change positive for this process? 2. Steam at 1 MPa, 6000C expands in...
2 The specific heat of mercury is 138 J/kgC. The following is calorimeter data: 1.00 kg of solid HG at its melting point f-39.0 degrees C is placed in a 0.625 kg aluminum calorimeter with 0.400 kg of water at 12.80 C. The resulting equilibrium final temperature is 5.06 C. a. Draw the T-Q phase diagram that represents this b. Calculate the latent heat of fusion of mercury from this data. c. What is the change in entropy of the...