How many joules of energy are needed to raise the temperature of an item 55 degrees if the heat capacity of the item is 259 J/"C? O 20400J O 314J O 14245 J O 4.71
How many joules of energy are needed to raise the temperature of an item 55 degrees if the heat capacity of the item is 259 J/"C? O 20400J O 314J O 14245 J O 4.71
Chemistry & Chemical Reactivity
9th Edition
ISBN:9781133949640
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter5: Principles Of Chemical Reactivity: Energy And Chemical Reactions
Section: Chapter Questions
Problem 47PS: An ice calorimeter can be used to determine the specific heat capacity of a metal. A piece of hot...
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Transcribed Image Text:How many joules of energy are needed to raise the temperature of an item 55 degrees
if the heat capacity of the item is 259 J/"C?
O 20400J
O 314J
O 14245 J
O 4.7J
Question 4
What temperature change would you expect if you have an object that has a specific
heat capacity of 982 J/g.°C, a mass of 75.2 grams, and it released 3476.2 joules of
heat.
O 47.1 K
O 47.1 K
O -45 K
O 45 K
Question 9
For the same substance, the enthalpy of fusion is much lower than the enthalpy of
vaporization (fusion= 6.02 kJ/mol and vaporization= 40.65 kJ/mol). What would be
the correct full explanation for why this occurs?
O When you melt a solid into a liquid, you need to completely overcome the intermolecular
forces holding the molecules together
O When you vaporize a liquid, you have to break bonds
O When you turm a liquid into a gas, you need to completely overcome the intermolecular
forces holding the molecules together
O When you melt a solid into a liquid, you need to break the bonds
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