The Dulong-Petit law was originally used to determine the molar mass of a substance from its...
The Dulong-Petit law was originally used to determine the molar mass of a substance from its measured heat capacity. The specific heat of a certain solid substance is measured to be 0.422 kJ/kg · K.
(a) Find the molar mass of the substance.
....................g/mol
(b) What element has this specific-heat value?
vanadium
chromium
manganese
iron
cobalt
nickel
copper
zinc
Homework Answers
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The Dulong-Petit law was originally used to determine the molar
mass of a substance from its...
Part 1.) Using the Law of Dulong and Petit and the given heat capacities determine the molar masses for the following me...
Part 1.) Using the Law of Dulong and Petit and the given heat capacities determine the molar masses for the following metals: Metal Specific heat J/ g⋅ oC Gold 0.1285 Silver 0.236 Magnesium 1.0419 Calculated Molar Mass of Silver in g/mol. (Put your answer in 4 significant figures) Part 2.) Using the Law of Dulong and Petit and the given heat capacities determine the molar masses for the following metals: Metal Specific heat J/ g⋅ oC Gold 0.129 Silver 0.2357...
In 1819, Pierre Dulong and Alexis Petit reported that the product of the atomic mass of...
In 1819, Pierre Dulong and Alexis Petit reported that the product of the atomic mass of a metal times its specific heat is approximately constant, an observation called the law of Dulong and Petit. Use the following data to answer the following questions. Mg/mol) Bismuth cs[J/(g.°c)] MX Cs 0.120 0.123 25.5 0.125 Lead Gold 207.2 197.0 195.1 118.7 Platinum Tin 65.4 0.215 0.233 0.388 0.397 0.433 0.460 Copper 63.5 Iron 55.8 32.1 Sulfur Average value: 0 (a) Complete the fourth...
#1 The molar enthalpy of vaporization of Substance B is 28.9 kJ/mol, and its normal boiling...
#1 The molar enthalpy of vaporization of Substance B is 28.9 kJ/mol, and its normal boiling point is 80.7 °C. What is the vapor pressure of Substance B at 22.1 °C. Respond with the vapor pressure in torr #2 Substance D has the following properties: ΔHvap = 18.9 kJ/mol ΔHfus = 3.5 kJ/mol Tb = 58.4 °C Tm = -39.8 °C Specific Heat (solid) = 3.8 J/g·°C Specific Heat (liquid) = 2.7 J/g·°C Specific Heat (gas) = 0.9 J/g·°C Calculate...
please help me answer #2 a, b, c and d measured value of the heat capacity...
please help me answer #2 a, b, c and d
measured value of the heat capacity be too high or too low? Explain. 2- A particular metallic element, M, has a heat capacity of 0.361.gº''K 1. It forms an oxide that contains 2.90 g of M per gram of oxygen. a) Using the law of Dulong and Petit (Cp x M = 25 J. mol-1.K-1), estimate the molar mass of the metal M. g/mol b) From the composition of the...
200 g of an unknown metal powder at Thot = 72°C are dropped into a negligible...
200 g of an unknown metal powder at Thot = 72°C are dropped into a negligible heat capacity calorimeter containing 150 g of water at 16°C. The final equilibrium temperature is measured to be 36.6°C. 1. Calculate the specific heat of the metal powder c. c = J/kg-°C 2. Identify the metal from the list below. Water Beryllium Aluminum Silicon Iron Copper Silver Gold Lead 3. Using the data table, calculate the specific heat per mole Cmolar of each pure...
Approximate Molar Mass of Metal (g/mole) (Equation 3) Compare your molar mass to the following list...
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Substance molar heat capacity (C.)/J•mol-1.°C-1 75.3 specific heat capacity (C.) /J•g-lo°C-1 0.384 H2O(1) Cu(s) C,H,OH(l) (ethanol)...
Substance molar heat capacity (C.)/J•mol-1.°C-1 75.3 specific heat capacity (C.) /J•g-lo°C-1 0.384 H2O(1) Cu(s) C,H,OH(l) (ethanol) Fe(s) 111.5 0.449 1. Fill in the empty entries in the table above. 2. If the same amount of energy is transferred to 1.0 g samples of each of the substances listed above, order them from largest AT to smallest AT. Explain. 3. Which is the consequence of copper's relatively low specific heat (0.385 J/(g°C)) compared to water (4.18 J/(g°C)) on the temperature change...
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TC01H02 Solid calcium hydroxide weighing 1.9984 g (molar mass = 74.09 g mor') is dissolved in 100.0 mL of 1.000 mol/L HCl in an open calorimeter which has a heat capacity of 15.87 JK! The initial temperature of the Ca(OH)2 and HCl is 19.14 °C and and the temperature of the solution is 24.20 °C at the completion of the reaction. Density of 1.000 mol/L HCl = 1.015 g/mL. Heat capacity of the final solution = 3.950 JK'g? Use the...
Question1: Question2: Determine the amount of heat energy (in kJ) needed to warm a 58.5 g...
Question1:
Question2:
Determine the amount of heat energy (in kJ) needed to warm a 58.5 g sample of ethanol (C2H5OH) from -150°C to 55°C. CH,OH 46.07 g/mol A Hape 38.56 kJ/mol AHIUS 4.90 kJ/mol Boiling 78.5°C Freezing Point -117.3°C Specific Heat Capacity (c) of solid 0.249 J/g.°C Specific Heat Capacity (c) of liquid 2.44 J/g.°C Specific Heat Capacity (c) of gas 1.70 J/g.°C Determine the mass (in grams) of N, that will dissolve in 155 Lof water that is in...
1. Ferrous metals include which of the following A Aluminum B. Copper C Gold D. Steel...
1. Ferrous metals include which of the following A Aluminum B. Copper C Gold D. Steel 2. The two categories of metals that are based onion (Fe) are A Aluminum Alloy & Castle B. Chromium & Nickel C. Manganese & Vanadium D. Cast Iron & Steel 3. Aluminum Alloy, Nickel Alloy, Zinc Alloy, and Titanium Alloy are cumples of A Nonferrous Metals B.Ceramics C Superllos D. Carmets 4. In the heating of most metal alloys melting begins at a certain...
In 1819, Pierre Dulong and Alexis Petit reported that the product of the atomic mass of a metal times its specific heat is approximately constant, an observation called the law of Dulong and Petit. Use the following data to answer the following questions. Mg/mol) Bismuth cs[J/(g.°c)] MX Cs 0.120 0.123 25.5 0.125 Lead Gold 207.2 197.0 195.1 118.7 Platinum Tin 65.4 0.215 0.233 0.388 0.397 0.433 0.460 Copper 63.5 Iron 55.8 32.1 Sulfur Average value: 0 (a) Complete the fourth...
please help me answer #2 a, b, c and d
measured value of the heat capacity be too high or too low? Explain. 2- A particular metallic element, M, has a heat capacity of 0.361.gº''K 1. It forms an oxide that contains 2.90 g of M per gram of oxygen. a) Using the law of Dulong and Petit (Cp x M = 25 J. mol-1.K-1), estimate the molar mass of the metal M. g/mol b) From the composition of the...
Approximate Molar Mass of Metal (g/mole) (Equation 3) Compare your molar mass to the following list of metals: aluminum, copper, zinc, tin, platinum, iron, nickel, silver, titanium, tungsten Unknown metal: Part B: Energy Content of Foods Mass of stopper assembly (pan, paperclip, and stopper) Mass of empty test tube + beaker 59.92 g 175.77. 185.60 g Mass test tube + 10mL water + beaker Mass of water Burning Foods: Type of Food Froot Loop Cheeto Puff Popcorn Marshmallow Mass Assembly...
Substance molar heat capacity (C.)/J•mol-1.°C-1 75.3 specific heat capacity (C.) /J•g-lo°C-1 0.384 H2O(1) Cu(s) C,H,OH(l) (ethanol) Fe(s) 111.5 0.449 1. Fill in the empty entries in the table above. 2. If the same amount of energy is transferred to 1.0 g samples of each of the substances listed above, order them from largest AT to smallest AT. Explain. 3. Which is the consequence of copper's relatively low specific heat (0.385 J/(g°C)) compared to water (4.18 J/(g°C)) on the temperature change...
TC01H02 Solid calcium hydroxide weighing 1.9984 g (molar mass = 74.09 g mor') is dissolved in 100.0 mL of 1.000 mol/L HCl in an open calorimeter which has a heat capacity of 15.87 JK! The initial temperature of the Ca(OH)2 and HCl is 19.14 °C and and the temperature of the solution is 24.20 °C at the completion of the reaction. Density of 1.000 mol/L HCl = 1.015 g/mL. Heat capacity of the final solution = 3.950 JK'g? Use the...
Question1:
Question2:
Determine the amount of heat energy (in kJ) needed to warm a 58.5 g sample of ethanol (C2H5OH) from -150°C to 55°C. CH,OH 46.07 g/mol A Hape 38.56 kJ/mol AHIUS 4.90 kJ/mol Boiling 78.5°C Freezing Point -117.3°C Specific Heat Capacity (c) of solid 0.249 J/g.°C Specific Heat Capacity (c) of liquid 2.44 J/g.°C Specific Heat Capacity (c) of gas 1.70 J/g.°C Determine the mass (in grams) of N, that will dissolve in 155 Lof water that is in...
1. Ferrous metals include which of the following A Aluminum B. Copper C Gold D. Steel 2. The two categories of metals that are based onion (Fe) are A Aluminum Alloy & Castle B. Chromium & Nickel C. Manganese & Vanadium D. Cast Iron & Steel 3. Aluminum Alloy, Nickel Alloy, Zinc Alloy, and Titanium Alloy are cumples of A Nonferrous Metals B.Ceramics C Superllos D. Carmets 4. In the heating of most metal alloys melting begins at a certain...
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