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The molar heat capacity of silver is 25.35 J mol-1 °C-!. How much energy would it take to raise the temperature of 11.4 g of silver by 11.8 °C ?

The molar heat capacity of silver is 25.35 J mol-1 °C-!. How much energy would it take to raise the temperature of 11.4 g of silver by 11.8 °C ?

Chemistry for Engineering Students
Chemistry for Engineering Students
4th Edition
ISBN:9781337398909
Author:Lawrence S. Brown, Tom Holme
Publisher:Lawrence S. Brown, Tom Holme
Chapter9: Energy And Chemistry
Section: Chapter Questions
Problem 9.104PAE: 9.104 An engineer is using sodium metal as a cooling agent in a design because it has useful thermal...
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Learning Goal: To understand the concepts of heat capacity, specific heat, and molar heat capacity. Heat capacity, C, is the amount of energy required to raise the temperature of a substance by exactly one degree Celsius. The energy needed to warm an object increases as the mass of that object increases. We see this in our everyday life. For example, we know that it takes much more energy to heat a large tank of water than a small cup. Because of this dependence on mass, experimentally determined heat capacities are always reported in terms of the amount of the substance that is heated. One method is to report how much energy it takes to raise the temperature of one mole of a substance by exactly one degree Celsius. This value is the molar heat capacity, which has the symbol Cp. The molar heat capacity is given in the units J mol- °C-1.A second method is to report how much energy it takes to raise the temperature of one gram of a substance by exactly one degree Celsius. This value is the specific heat, which has been given the symbol Cs. The units for specific heat are J g-l°C-1. The heat capacity of a substance is therefore related to the energy q needed to raise its temperature by an amount AT. That is, nC,AT, where n denotes the number of MC3AT, where moles of the substance, or q = m denotes the number of grams of the substance.
Transcribed Image Text:Learning Goal: To understand the concepts of heat capacity, specific heat, and molar heat capacity. Heat capacity, C, is the amount of energy required to raise the temperature of a substance by exactly one degree Celsius. The energy needed to warm an object increases as the mass of that object increases. We see this in our everyday life. For example, we know that it takes much more energy to heat a large tank of water than a small cup. Because of this dependence on mass, experimentally determined heat capacities are always reported in terms of the amount of the substance that is heated. One method is to report how much energy it takes to raise the temperature of one mole of a substance by exactly one degree Celsius. This value is the molar heat capacity, which has the symbol Cp. The molar heat capacity is given in the units J mol- °C-1.A second method is to report how much energy it takes to raise the temperature of one gram of a substance by exactly one degree Celsius. This value is the specific heat, which has been given the symbol Cs. The units for specific heat are J g-l°C-1. The heat capacity of a substance is therefore related to the energy q needed to raise its temperature by an amount AT. That is, nC,AT, where n denotes the number of MC3AT, where moles of the substance, or q = m denotes the number of grams of the substance.
Part B The molar heat capacity of silver is 25.35 J mol- °C-!. How much energy would it take to raise the temperature of 11.4 g of silver by 11.8 °C ? Express your answer with the appropriate units. • View Available Hint(s) HẢ ? q = Value Units Submit Part C What is the specific heat of silver? Express your answer with the appropriate units. • View Available Hint(s) HẢ ? Value Units Submit
Transcribed Image Text:Part B The molar heat capacity of silver is 25.35 J mol- °C-!. How much energy would it take to raise the temperature of 11.4 g of silver by 11.8 °C ? Express your answer with the appropriate units. • View Available Hint(s) HẢ ? q = Value Units Submit Part C What is the specific heat of silver? Express your answer with the appropriate units. • View Available Hint(s) HẢ ? Value Units Submit
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