Homework Answers
1. Molar heat of fusion is the amount of heat required to melt the solid. From the graph we can conclude that the molar heat of fusion in apporx 110kJ
2. Molar heat of vaporisation is when liquid turns into gas, from graph it is around 210.
3. Specific heat capacity gives us the information about the amount of heat requires to rise the temperature of unit mass by 1 degree. Here for this solid it it 100 kJ
4. Specific heat of capacity for the liquid is 100KJ
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Heating Curve for 1 Mole at 1 Atm heating of gas 500 gas 400 heating of...
4. Use the following data to sketch a heating curve for 1 mole of methanol. Start...
4. Use the following data to sketch a heating curve for 1 mole of methanol. Start the curve at -100°C and end it at 100°C Boiling point: 65 c; Melting point: -94*C; AHvap: 37 kJ/moI; AHsus: 3.18 kJ/mol; Molar heat capacities, liquid: 81.1 J/(mo*C), gas: 43.9 J/(mol*C), solid: 48.7 J/(mol°C)
5.) The following is a heating curve for I mole of an unknown substance. Answer the...
5.) The following is a heating curve for I mole of an unknown substance. Answer the following on the basis of this diagram. 350 Temperature (K) Vapor 0 10 50 60 20 30 40 Heal added (J/mol) a.) Estimate the heat of vaporization for this substance. MO b.) Estimate the heat capacity of the solid of this substance in J/mol-K 10.87 MOL malu c.) Estimate the boiling point of this substance.
11. The following would be required for calculations of heat flow in which of the heating...
11. The following would be required for calculations of heat flow in which of the heating curve steps ? Molar heat of vaporization of water (AH vap = 40.7 kJ/mol) Specific heat of ice (Cice = 2.09 J/g °C) Molar heat of fusion of water (AH fus = 6.02 kJ/mol) Specific heat of water (C H20 = 4.18 J/g °C) Specific heat of steam(C steam = 2.01 J/g °C) Heating Curve for Water Degrees Celsius -50+ 0 400 800 1200...
Select all accurate statements about the heating curve shown for ethanol (C)H,OH). C2H5OH 46.07 g/mol 161...
Select all accurate statements about the heating curve shown for ethanol (C)H,OH). C2H5OH 46.07 g/mol 161 C AHvap 42.59KJ/mol 78.5 AHfus A 5.021 kJ/mol Boiling Point 78.5°C Heat Added Freezing Point -117.3°C Specific Heat Capacity (c) of liquid 2.42 J/g°C Specific Heat 1.42 J/g°C Capacity (c) of gas Temperature (C) B The portion of the heating curve labeled "A represents the increase in the average kinetic energy of the liquid phase of ethanol. The portion of the heating curve labeled...
An experiment is performed on an unknown material and produces the following heat curve. The temperature...
An experiment is performed on an unknown material and produces the following heat curve. The temperature of the material is shown as a function of heat added. If the sample of material has a mass of m- 9.20 g, calculate the specific heat when this material is a solid, Cs, and when it is liquid, q. (Please see the hint panel for the explicit temperatures of fusion and vaporization, do not try to approximate from the graph.) Temperature (Celsius) 550...
i tried working on it but I am a little lost. Sorry for the messy work...
i
tried working on it but I am a little lost. Sorry for the messy
work covering the page.
1. Heating causes the internal energy of 1.0 kg of some substance to change from a solid at -174°C to a gas at +158°C, as shown in the graph below. Determine the following: (a) The freezing-melting temperature. 114 (b) The boiling-condensing temperature. 70 (e) The specific heat capacity of the solid. I *2KJ= (1.069) 631-11.4°C-1-174°()) TIC G2 1.2 KJ/g °C As...
Using the following heating curve, what line represents the melting point ["AB", "DE", "CD", "BC", "EF"] ? What line rep...
Using the following heating curve, what line represents the melting point ["AB", "DE", "CD", "BC", "EF"] ? What line represents the boiling point ["AB", "CD", "EF", "DE", "BC"] ? Where would you use the specific heat capacity of a solid ["DE", "EF", "AB", "BC", "CD"] ? Specific heat capacity of a liquid ["DE", "AB", "CD", "EF", "BC"] ? Specific heat capacity of a solid ["AB", "CD", "DE", "EF", "BC"] ? Where would you use the heat of fusion (ΔHfus) ["EF", "AB", "DE",...
1. At 1 atm, how much energy is required to heat 35.0 g H2O(s) at −10.0...
1. At 1 atm, how much energy is required to heat 35.0 g H2O(s) at −10.0 ∘C to H2O(g) at 137.0 ∘C? Use the heat transfer constants found in this Quantity per gram per mole Enthalpy of fusion 333.6 J/g 6010. J/mol Enthalpy of vaporization 2257 J/g 40660 J/mol Specific heat of solid H2O (ice) 2.087 J/(g·°C) * 37.60 J/(mol·°C) * Specific heat of liquid H2O (water) 4.184 J/(g·°C) * 75.37 J/(mol·°C) * Specific heat of gaseous H2O (steam) 2.000...
1. The normal boiling point of benzene (i.e., at 1 atm) is 80.09 °C. The molar...
1. The normal boiling point of benzene (i.e., at 1 atm) is 80.09 °C. The molar enthalpy of vaporization is 30.72 kJ mol . Assuming that AvapHm and AvapSm stay constant at their values at 80.09°C, calculate the values of AvapGm at 75.0 °C, 80.09 °C and 85.0 °C. Given your calculated values, do you still expect benzene to spontaneously condense at 75.0 °C and to spontaneously evaporate at 85.0°C? -1 2. The vapor pressure of a liquid was measured...
How much heat energy is required to convert 15.0 g of solid ethanol at -114.5 °C...
How much heat energy is required to convert 15.0 g of solid
ethanol at -114.5 °C to gasesous ethanol at 143.1 °C? The molar
heat of fusion of ethanol is 4.60 kJ/mol and its molar heat of
vaporization is 38.56 kJ/mol. Ethanol has a normal melting point of
-114.5 °C and a normal boiling point of 78.4 °C. The specific heat
capacity of liquid ethanol is 2.45 J/g·°C and that of gaseous
ethanol is 1.43 J/g·°C.
How much heat energy...
4. Use the following data to sketch a heating curve for 1 mole of methanol. Start the curve at -100°C and end it at 100°C Boiling point: 65 c; Melting point: -94*C; AHvap: 37 kJ/moI; AHsus: 3.18 kJ/mol; Molar heat capacities, liquid: 81.1 J/(mo*C), gas: 43.9 J/(mol*C), solid: 48.7 J/(mol°C)
5.) The following is a heating curve for I mole of an unknown substance. Answer the following on the basis of this diagram. 350 Temperature (K) Vapor 0 10 50 60 20 30 40 Heal added (J/mol) a.) Estimate the heat of vaporization for this substance. MO b.) Estimate the heat capacity of the solid of this substance in J/mol-K 10.87 MOL malu c.) Estimate the boiling point of this substance.
11. The following would be required for calculations of heat flow in which of the heating curve steps ? Molar heat of vaporization of water (AH vap = 40.7 kJ/mol) Specific heat of ice (Cice = 2.09 J/g °C) Molar heat of fusion of water (AH fus = 6.02 kJ/mol) Specific heat of water (C H20 = 4.18 J/g °C) Specific heat of steam(C steam = 2.01 J/g °C) Heating Curve for Water Degrees Celsius -50+ 0 400 800 1200...
Select all accurate statements about the heating curve shown for ethanol (C)H,OH). C2H5OH 46.07 g/mol 161 C AHvap 42.59KJ/mol 78.5 AHfus A 5.021 kJ/mol Boiling Point 78.5°C Heat Added Freezing Point -117.3°C Specific Heat Capacity (c) of liquid 2.42 J/g°C Specific Heat 1.42 J/g°C Capacity (c) of gas Temperature (C) B The portion of the heating curve labeled "A represents the increase in the average kinetic energy of the liquid phase of ethanol. The portion of the heating curve labeled...
An experiment is performed on an unknown material and produces the following heat curve. The temperature of the material is shown as a function of heat added. If the sample of material has a mass of m- 9.20 g, calculate the specific heat when this material is a solid, Cs, and when it is liquid, q. (Please see the hint panel for the explicit temperatures of fusion and vaporization, do not try to approximate from the graph.) Temperature (Celsius) 550...
i
tried working on it but I am a little lost. Sorry for the messy
work covering the page.
1. Heating causes the internal energy of 1.0 kg of some substance to change from a solid at -174°C to a gas at +158°C, as shown in the graph below. Determine the following: (a) The freezing-melting temperature. 114 (b) The boiling-condensing temperature. 70 (e) The specific heat capacity of the solid. I *2KJ= (1.069) 631-11.4°C-1-174°()) TIC G2 1.2 KJ/g °C As...
1. The normal boiling point of benzene (i.e., at 1 atm) is 80.09 °C. The molar enthalpy of vaporization is 30.72 kJ mol . Assuming that AvapHm and AvapSm stay constant at their values at 80.09°C, calculate the values of AvapGm at 75.0 °C, 80.09 °C and 85.0 °C. Given your calculated values, do you still expect benzene to spontaneously condense at 75.0 °C and to spontaneously evaporate at 85.0°C? -1 2. The vapor pressure of a liquid was measured...
How much heat energy is required to convert 15.0 g of solid
ethanol at -114.5 °C to gasesous ethanol at 143.1 °C? The molar
heat of fusion of ethanol is 4.60 kJ/mol and its molar heat of
vaporization is 38.56 kJ/mol. Ethanol has a normal melting point of
-114.5 °C and a normal boiling point of 78.4 °C. The specific heat
capacity of liquid ethanol is 2.45 J/g·°C and that of gaseous
ethanol is 1.43 J/g·°C.
How much heat energy...
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