Homework Answers
a) Heat of vaporisation = heat along the second line parallel to x-axis = 24 KJ/mol
b)Heat capacity of solid = 10 KJ/mol / 90 K = 10000 / 90 = 111.11 J/mol-K
c) boiling point = Temperature at which second line parallel to x-axis = 340 K
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5.) The following is a heating curve for I mole of an unknown substance. Answer the...
Heating Curve for 1 Mole at 1 Atm heating of gas 500 gas 400 heating of...
Heating Curve for 1 Mole at 1 Atm heating of gas 500 gas 400 heating of lig 300 TK 200 solid I evaporation liquid/ 100+ b L Melning Freezing - Valporization 0 + 100 400 500 200 300 Energy added, kJ Use the heating curve in Model 2 to estimate values for the following parameters of the Assume that the molar mass of the substance is 120 g/mol. a. molar heat of fusion b. molar heat of vaporization c. specific...
6. Shown below is the heating curve for a substance. The five segments of the heating...
6. Shown below is the heating curve for a substance. The five segments of the heating curve are labeled A-E 130 100 T (°C) heat added (kJ) I. ndicate the phases of matter present when the substance is at each point (A-E) on the heating curve For this substance, which phase of matter has the largest heat capacity? How can you tell? In what state of matter would this substance exist at room temperature? How can you tell? IV. In...
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)
Consider the heating curve of a substance in the mebe across the curve. what is happening...
Consider the heating curve of a substance in the mebe across the curve. what is happening at point 47 Temperature of Substance Heat Added the solid is melting to liquid the temperature of the solid is increasing € ) e https Noregonstate instructure.com/course/1772484/ 25601/ Consider the heating curve of a substance in the image below. Moving from left to right across the curve, what is happening at point 47 Temperature of Substance Heat Added the solidis melting to bud the...
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...
O GASES, LUIDJA Identifying phase transitions on a heating curve A pure v ample of Substance...
O GASES, LUIDJA Identifying phase transitions on a heating curve A pure v ample of Substance X is put into an evacuated flask. The flask is heated at a ste graph of the results: temperature (°C) heat added (kJ/mol) Use this graph to answer the following questions: What is the melting point of X? Ilc What phase (physical state) of X would you expect to find in the flask after 10 kJ/mol of heat has been added? (check all that...
An experiment is performed on an unknown material and produces the given heal curve. The temperature...
An experiment is performed on an unknown material and produces the given heal curve. The temperature of the material is shown as a function of heal added. In the table, 7 = 47.7 C, E = 167J, Es=836, E = 1410 J, and Ex=2890 J. Other experiments delcrmine that the material has a temperature of fusion of Th =239 "Cand a temperature of vaporization of Traper = 485 °C. If the sample of material has a mass of m=9.80 g,...
a heat curve for an unknown outerspace substance discovered by the Mars rover By understanding the...
a heat curve for an unknown outerspace substance discovered by the Mars rover By understanding the heat curve, scientists can make inferences about the composition of the planet. What is the temperature of fusion, Trasion, and vaporization, Twpor. for this unknown substance? Note that the units are graded 400 Number Units eae 340 20 300 Number Units 200 180 8e 140 120 100 80 aper For a sample of 65.8 g of this substance with a specific heat of 52.0...
Consider the following data for an unknown substance X: AHvap = 21.00 kJ/mol Specific heat capacity...
Consider the following data for an unknown substance X: AHvap = 21.00 kJ/mol Specific heat capacity of liquid = 2.40 J/g. °C Boiling point = 70.0°C Molar mass=92.00 g/mol When the temperature of 1.000 mole of X(g) is lowered from 94.0°C to form X(1) at 46.0°C, 29.97 kJ of heat is released. Calculate the specific heat capacity of X(9). Specific heat capacity = J/g. °C Submit Answer Try Another Version 5 item attempts remaining
Consider the heating curve of a substance in the image below. Moving from left to right...
Consider the heating curve of a substance in the image below.
Moving from left to right across the curve, what is happening at
point 3?
4 5 Temperature of Substance 3 2. Heat Added the temperature of the solid is increasing the liquid is evaporating to yield gas O the temperature of the gas is increasing the temperature of the liquid is increasing the solid is melting to liquid
Heating Curve for 1 Mole at 1 Atm heating of gas 500 gas 400 heating of lig 300 TK 200 solid I evaporation liquid/ 100+ b L Melning Freezing - Valporization 0 + 100 400 500 200 300 Energy added, kJ Use the heating curve in Model 2 to estimate values for the following parameters of the Assume that the molar mass of the substance is 120 g/mol. a. molar heat of fusion b. molar heat of vaporization c. specific...
6. Shown below is the heating curve for a substance. The five segments of the heating curve are labeled A-E 130 100 T (°C) heat added (kJ) I. ndicate the phases of matter present when the substance is at each point (A-E) on the heating curve For this substance, which phase of matter has the largest heat capacity? How can you tell? In what state of matter would this substance exist at room temperature? How can you tell? IV. In...
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)
Consider the heating curve of a substance in the mebe across the curve. what is happening at point 47 Temperature of Substance Heat Added the solid is melting to liquid the temperature of the solid is increasing € ) e https Noregonstate instructure.com/course/1772484/ 25601/ Consider the heating curve of a substance in the image below. Moving from left to right across the curve, what is happening at point 47 Temperature of Substance Heat Added the solidis melting to bud the...
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...
O GASES, LUIDJA Identifying phase transitions on a heating curve A pure v ample of Substance X is put into an evacuated flask. The flask is heated at a ste graph of the results: temperature (°C) heat added (kJ/mol) Use this graph to answer the following questions: What is the melting point of X? Ilc What phase (physical state) of X would you expect to find in the flask after 10 kJ/mol of heat has been added? (check all that...
An experiment is performed on an unknown material and produces the given heal curve. The temperature of the material is shown as a function of heal added. In the table, 7 = 47.7 C, E = 167J, Es=836, E = 1410 J, and Ex=2890 J. Other experiments delcrmine that the material has a temperature of fusion of Th =239 "Cand a temperature of vaporization of Traper = 485 °C. If the sample of material has a mass of m=9.80 g,...
a heat curve for an unknown outerspace substance discovered by the Mars rover By understanding the heat curve, scientists can make inferences about the composition of the planet. What is the temperature of fusion, Trasion, and vaporization, Twpor. for this unknown substance? Note that the units are graded 400 Number Units eae 340 20 300 Number Units 200 180 8e 140 120 100 80 aper For a sample of 65.8 g of this substance with a specific heat of 52.0...
Consider the following data for an unknown substance X: AHvap = 21.00 kJ/mol Specific heat capacity of liquid = 2.40 J/g. °C Boiling point = 70.0°C Molar mass=92.00 g/mol When the temperature of 1.000 mole of X(g) is lowered from 94.0°C to form X(1) at 46.0°C, 29.97 kJ of heat is released. Calculate the specific heat capacity of X(9). Specific heat capacity = J/g. °C Submit Answer Try Another Version 5 item attempts remaining
Consider the heating curve of a substance in the image below.
Moving from left to right across the curve, what is happening at
point 3?
4 5 Temperature of Substance 3 2. Heat Added the temperature of the solid is increasing the liquid is evaporating to yield gas O the temperature of the gas is increasing the temperature of the liquid is increasing the solid is melting to liquid
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