In an isolated system, a solid gold bar at 5°C is placed in direct contact with a solid iron bar at 35°C. Which of the following best describes the final temperature this system? 3. (а) 5°C < T2 < 35°C (b) T2 = 5°C (с) Т, - 35°С (d) T2 = 0°C The specific heat for Al is 0.900 J/°C• . The specific heat for Fe is 0.444 J/°C-g. The specific heat for Cu is 0.385 J/°C g. Ten-gram samples of aluminum, iron, and copper are each initially at 25.0°C. After each sample absorbs 25 J of heat, which sample has the highest temperature? 4. (a) Al (b) Fe (с) Cu (d) They all have the same temperature, because each absorbed the same amount of heat energy.
In an isolated system, a solid gold bar at 5°C is placed in direct contact with a solid iron bar at 35°C. Which of the following best describes the final temperature this system? 3. (а) 5°C < T2 < 35°C (b) T2 = 5°C (с) Т, - 35°С (d) T2 = 0°C The specific heat for Al is 0.900 J/°C• . The specific heat for Fe is 0.444 J/°C-g. The specific heat for Cu is 0.385 J/°C g. Ten-gram samples of aluminum, iron, and copper are each initially at 25.0°C. After each sample absorbs 25 J of heat, which sample has the highest temperature? 4. (a) Al (b) Fe (с) Cu (d) They all have the same temperature, because each absorbed the same amount of heat energy.
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
Question
Questions 3 and 4 respectfully
Transcribed Image Text:(b)
the internal energy change of the system
(c)
the enthalpy change of the system
(d)
the PV-work threshold
2.
A system does 12 J of work on the surroundings while it absorbs 23 J of heat. What is AE?
(а)
35 J
(b)
11 J
(c)
–11 J
(d)
-35 J
In an isolated system, a solid gold bar at 5°C is placed in direct contact with a solid iron bar at 35°C.
Which of the following best describes the final temperature this system?
3.
(а)
5°C < T, < 35°C
(b) T2 = 5°C
(с) Т, — 35°С
(d) T2
= 0°C
4.
The specific heat for Al is 0.900 J/°C-g . The specific heat for Fe is 0.444 J/°C•g. The specific heat
for Cu is 0.385 J/°C-g. Ten-gram samples of aluminum, iron, and copper are each initially at 25.0°C.
After each sample absorbs 25 J of heat, which sample has the highest temperature?
(а) Al
(b) Fe
(с) Cu
(d) They all have the same temperature, because each absorbed the same amount of heat energy.
In a constant-pressure coffee-cup calorimeter, an aqueous neutralization reaction causes a temperature
increase in the water. Which of the following best describes the thermochemistry of this reaction?
5.
(а)
AHneutralizetion is negative and the reaction is exothermic.
ous
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