Specific Heats of Substances Substance Brick Ethanol Wood heat added: Calculate the amount of heat, in calories, that must be added to warm 39.2 g of brick from 20.1 °C to 50.7 °C. Assume no changes in state occur during this change in temperature. 77.48 heat added: Incorrect Specific Heat 0.20 0.58 0.10 224.69 cal g-°C Calculate the amount of heat, in calories, that must be added to warm 39.2 g of ethanol from 20.1 °C to 50.7 °C. Assume no changes in state occur during this change in temperature. Incorrect Attempt 1 Calculate the amount of heat, in calories, that must be added to warm 39.2 g of wood from 20.1 °C to 50.7 °C. Assume no changes in state occur during this change in temperature. cal cal
Specific Heats of Substances Substance Brick Ethanol Wood heat added: Calculate the amount of heat, in calories, that must be added to warm 39.2 g of brick from 20.1 °C to 50.7 °C. Assume no changes in state occur during this change in temperature. 77.48 heat added: Incorrect Specific Heat 0.20 0.58 0.10 224.69 cal g-°C Calculate the amount of heat, in calories, that must be added to warm 39.2 g of ethanol from 20.1 °C to 50.7 °C. Assume no changes in state occur during this change in temperature. Incorrect Attempt 1 Calculate the amount of heat, in calories, that must be added to warm 39.2 g of wood from 20.1 °C to 50.7 °C. Assume no changes in state occur during this change in temperature. cal cal
Chemistry by OpenStax (2015-05-04)
1st Edition
ISBN:9781938168390
Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Chapter5: Thermochemistry
Section: Chapter Questions
Problem 51E: A sample of 0.562 g of carbon is burned in oxygen in a bomb calorimeter, producing carbon dioxide....
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Concept explainers
Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
Question
Transcribed Image Text:Macmillan Learning
Specific Heats of Substances
Substance
Brick
Ethanol
Wood
heat added:
Calculate the amount of heat, in calories, that must be added to warm 39.2 g of brick from 20.1 °C to 50.7 °C. Assume no
changes in state occur during this change in temperature.
77.48
heat added:
Incorrect
cal
Specific Heat g.°C
224.69
0.20
0.58
0.10
Calculate the amount of heat, in calories, that must be added to warm 39.2 g of ethanol from 20.1 °C to 50.7 °C. Assume no
changes in state occur during this change in temperature.
Incorrect
Attempt 1
Calculate the amount of heat, in calories, that must be added to warm 39.2 g of wood from 20.1 °C to 50.7 °C. Assume no
changes in state occur during this change in temperature.
cal
cal
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