6.Enthalpy of physical changes: a.Steam (water vapor) at 167 C is bubbled in liquid water at...
6.Enthalpy of physical changes: a.Steam (water vapor) at 167 C is bubbled in liquid water at 25 °C to quickly heat it up. Calculate how much steam is needed to bring to ebullition 1.24 Kg of water. b.Calculate how much steam would be needed if instead of liquid water, you were to use 1.24Kg of solid ice at -18 C. c.Once the water from question 3b is boiling, how much more ice at -18 C would be needed to freeze the overall amount of water?
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i'm afraid the last question
was a little vague but i worked out both the possibilities,plz
check those out.
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6.Enthalpy of physical changes: a.Steam (water vapor) at 167 C
is bubbled in liquid water at...
Assume a glass that is insulated that contains 0.45 kg of water at 20 ℃
Assume a glass that is insulated that contains 0.45 kg of water at 20℃. You would like to bring its temperature down to 0 ℃ by adding cubes of ice. The enthalpy of fusion of the ice h_melting = 333.5 KJ/Kg (this is the variation of the enthalpy of the substance per unit mass or the amount of heat needed to change the state of the water from a solid to a liquid, at constant pressure). How much ice (in...
Consider three 10-9 samples of water one as ice, one as liquid, and one as vapor...
Consider three 10-9 samples of water one as ice, one as liquid, and one as vapor MY NOTES ASK YOUR TEACHER How do the volumes of these three samples compare with one another? The gaseous 10-9 sample of water has a much larger volume than the solid sample, but about the same volume as the liquid sample O Because we do not know the pressure of the gaseous sample, we can only conclude that the liquid and son 10- samples...
Ethanol (C2H5OH) melts at -114 ∘C and boils at 78 ∘C. The enthalpy of fusion of...
Ethanol (C2H5OH) melts at -114 ∘C and boils at 78 ∘C. The enthalpy of fusion of ethanol is 5.02 kJ/mol, and its enthalpy of vaporization is 38.56 kJ/mol. The specific heat of solid and liquid ethanol are 0.97 J/g⋅K are 2.3 J/g⋅K respectively. A) How much heat is required to convert 30.5 g of ethanol at 30 ∘C to the vapor phase at 78 ∘C? Q=______kJ B)How much heat is required to convert 30.5 g of ethanol at -167 ∘C...
12. Reflux is the process of turning liquid into vapor. a. b. the process of changing...
12. Reflux is the process of turning liquid into vapor. a. b. the process of changing a solid to a gas without ever passing through a liquid phase the process of boiling a liquid in such a way that any vapor is liquefied and returned to the flask. the physical process that results in the phase transition of a substance from a solid to a liquid. c. d. 13. If a student was going to react 4.88 g of potassium...
Question 6 Calculate the vapor pressure of water at 52.4°C in units of torr. The enthalpy of vaporizatio water is 40...
Question 6 Calculate the vapor pressure of water at 52.4°C in units of torr. The enthalpy of vaporizatio water is 40.7 kJ/mol. The normal boiling point of water is 100°C. No new data to save. Last checked at 2:02pm
I would really appreciate your help. God bless you Question 4 The molar enthalpy of fusion of ice at 0 °C and 1 atm...
I would really appreciate your help. God bless
you
Question 4 The molar enthalpy of fusion of ice at 0 °C and 1 atm pressure is 6024 J mol. The molar heat capacities at constant pressure of ice and water are 37.65 J Kmol and 75.30 J Kmol respectively, and may be taken as constant over the temperature range 0 to -20°C. Consider 2 mole of liquid water supercooled to -20 °C, which is allowed to freeze isothermally from liquid...
4. (4 points) Liquid water enters a steady-state heat exchanger at P 1 MPa and T-353.15...
4. (4 points) Liquid water enters a steady-state heat exchanger at P 1 MPa and T-353.15 K, and exits as saturated water vapor at P-1 MPa A. Using the steam tables, find the change in specific enthalpy for this process. B. Using the approximation that Cp-4.19 kJ/kg-K for liquid water, find the change in enthalpy when liquid water is heated from 353.15 K to its boiling point at P 1 MPa. C. How do the answers to parts A and...
The following table provides the specific heat and enthalpy changes for water and ice Substance Specific...
The following table provides the specific heat and enthalpy changes for water and ice Substance Specific heat [J/(g⋅∘C)][J/(g⋅∘C)] ΔHΔH (kJ/mol)(kJ/mol) water 4.18 44.0 ice 2.01 6.01 a) Calculate the enthalpy change, ΔHΔHDeltaH, for the process in which 42.3 gg of water is converted from liquid at 3.2 ∘C∘C to vapor at 25.0 ∘C∘C . For water, ΔHvapΔHvapH = 44.0 kJ/molkJ/mol at 25.0 ∘C∘C and CsCsC_s = 4.18 J/(g⋅∘C) J/(g⋅∘C) for H2O(l)H2O(l). Express your answer to three significant figures and include the...
How much heat is released when 15g of ice is heated from -12 °C to water vapor at 105 °C? (AH fus = 79.5 cal/g, AH...
How much heat is released when 15g of ice is heated from -12 °C to water vapor at 105 °C? (AH fus = 79.5 cal/g, AH vap = 539 cal/g) Substance Specific Heat (cal/g °C) 1.00 Water (liquid) Water (gas) Water (solid) 0.497 0.490
Pleases help me thanks. 5 kg of liquid water at 100°C was converted to steam at...
Pleases help me thanks.
5 kg of liquid water at 100°C was converted to steam at 100°C by boiling at standard atmospheric pressure, in the arrangement of the figure below. The volume of the water changed from an initial value of 0.005 mº as a liquid to 8.355 mº as steam. Latent heat of vaporization for water Lv = 2256 kJ/kg. Standard atmospheric pressure is 1 atm or 1.01 x 109 Pa. Loaded Piston Steam Insulation Insulation Liquid water Thermal...
Consider three 10-9 samples of water one as ice, one as liquid, and one as vapor MY NOTES ASK YOUR TEACHER How do the volumes of these three samples compare with one another? The gaseous 10-9 sample of water has a much larger volume than the solid sample, but about the same volume as the liquid sample O Because we do not know the pressure of the gaseous sample, we can only conclude that the liquid and son 10- samples...
12. Reflux is the process of turning liquid into vapor. a. b. the process of changing a solid to a gas without ever passing through a liquid phase the process of boiling a liquid in such a way that any vapor is liquefied and returned to the flask. the physical process that results in the phase transition of a substance from a solid to a liquid. c. d. 13. If a student was going to react 4.88 g of potassium...
Question 6 Calculate the vapor pressure of water at 52.4°C in units of torr. The enthalpy of vaporizatio water is 40.7 kJ/mol. The normal boiling point of water is 100°C. No new data to save. Last checked at 2:02pm
I would really appreciate your help. God bless
you
Question 4 The molar enthalpy of fusion of ice at 0 °C and 1 atm pressure is 6024 J mol. The molar heat capacities at constant pressure of ice and water are 37.65 J Kmol and 75.30 J Kmol respectively, and may be taken as constant over the temperature range 0 to -20°C. Consider 2 mole of liquid water supercooled to -20 °C, which is allowed to freeze isothermally from liquid...
4. (4 points) Liquid water enters a steady-state heat exchanger at P 1 MPa and T-353.15 K, and exits as saturated water vapor at P-1 MPa A. Using the steam tables, find the change in specific enthalpy for this process. B. Using the approximation that Cp-4.19 kJ/kg-K for liquid water, find the change in enthalpy when liquid water is heated from 353.15 K to its boiling point at P 1 MPa. C. How do the answers to parts A and...
How much heat is released when 15g of ice is heated from -12 °C to water vapor at 105 °C? (AH fus = 79.5 cal/g, AH vap = 539 cal/g) Substance Specific Heat (cal/g °C) 1.00 Water (liquid) Water (gas) Water (solid) 0.497 0.490
Pleases help me thanks.
5 kg of liquid water at 100°C was converted to steam at 100°C by boiling at standard atmospheric pressure, in the arrangement of the figure below. The volume of the water changed from an initial value of 0.005 mº as a liquid to 8.355 mº as steam. Latent heat of vaporization for water Lv = 2256 kJ/kg. Standard atmospheric pressure is 1 atm or 1.01 x 109 Pa. Loaded Piston Steam Insulation Insulation Liquid water Thermal...
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