Use the heating-cooling curve below to answer the following questions. 160 Temperature (°C) 110l A curve with five distinct linear sections is shown on a plane with a horizontal axis labeled: "Heat added at a constant rate" with a right arrow suggesting the heat added increases from left to right. The vertical axis is labeled: "Temperature (°C)". • First section: starts at origin with an approximate 80 temperature of 0°C, moves up and to the right, and ends at approximately 19°C. • Second section: continues right horizontally. • Third section: moves up and to the right, ending at 40 approximately 102°C. Fourth section: continues right horizontally. The horizontal distance for this section is much greater than the other sections. • Fifth section: moves up and to the right, exiting the top of the graph at approximately 160°C. 0 (a) What is the freezing point (in °C) of the liquid? °C (b) What is the boiling point (in °C) of the liquid? °C
Use the heating-cooling curve below to answer the following questions. 160 Temperature (°C) 110l A curve with five distinct linear sections is shown on a plane with a horizontal axis labeled: "Heat added at a constant rate" with a right arrow suggesting the heat added increases from left to right. The vertical axis is labeled: "Temperature (°C)". • First section: starts at origin with an approximate 80 temperature of 0°C, moves up and to the right, and ends at approximately 19°C. • Second section: continues right horizontally. • Third section: moves up and to the right, ending at 40 approximately 102°C. Fourth section: continues right horizontally. The horizontal distance for this section is much greater than the other sections. • Fifth section: moves up and to the right, exiting the top of the graph at approximately 160°C. 0 (a) What is the freezing point (in °C) of the liquid? °C (b) What is the boiling point (in °C) of the liquid? °C
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter12: Thermodynamic Processes And Thermochemistry
Section: Chapter Questions
Problem 15P
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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:Use the heating-cooling curve below to answer the following questions.
160
Temperature (°C)
140
A curve with five distinct linear sections is shown on a plane with a
horizontal axis labeled: "Heat added at a constant rate" with a
right arrow suggesting the heat added increases from left to right.
The vertical axis is labeled: "Temperature (°C)".
• First section: starts at origin with an approximate
80 temperature of 0°C, moves up and to the right, and ends at
approximately 19°C.
. Second section: continues right horizontally.
• Third section: moves up and to the right, ending at
40 approximately 102°C.
• Fourth section: continues right horizontally. The horizontal
20 distance for this section is much greater than the other
sections.
• Fifth section: moves up and to the
the graph at approximately 160°C.
e right, exiting the top of
(a) What is the freezing point (in °C) of the liquid?
°℃
(b) What is the boiling point (in °C) of the liquid?
°℃
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