When NH4CI is added to water, the resulting solution feels cool to the touch. Which best describes this obsenvation?

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
Chapter11: Solutions
Section: Chapter Questions
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I need the answer to question 6

B Heat energy flows from A to B as the average kinetic energy of the particles in A increases
C Heat energy flows from B to A as the average kinetic energy of the particles in B decreases
D Heat energy flows from B to A as the average kinetic energy of the particles in B increases
When NH4CI is added to water, the resulting solution feels cool to the touch. Which best describes
this observation?
A The matter, or solution, has a positive AT while the process of dissolving has a negative AH.
B The matter, or solution, has a negative AT while the process of dissolving has a negative AH.
C The matter, or solution, has a positive AT while the process of dissolving has a positive AH.
D The matter, or solution, has a negative AT while the process of dissolving has a positive AH.
7.
A sample of aluminum metal absorbs 9.86 J of heat, and the temperature of the sample increases
from 23.2°C to 30.5°C. Given that the specific heat capacity of aluminum is 0.90 the mass of the
sample is:
A 72 g
B 65 g
C 8.1 g
6.
Transcribed Image Text:B Heat energy flows from A to B as the average kinetic energy of the particles in A increases C Heat energy flows from B to A as the average kinetic energy of the particles in B decreases D Heat energy flows from B to A as the average kinetic energy of the particles in B increases When NH4CI is added to water, the resulting solution feels cool to the touch. Which best describes this observation? A The matter, or solution, has a positive AT while the process of dissolving has a negative AH. B The matter, or solution, has a negative AT while the process of dissolving has a negative AH. C The matter, or solution, has a positive AT while the process of dissolving has a positive AH. D The matter, or solution, has a negative AT while the process of dissolving has a positive AH. 7. A sample of aluminum metal absorbs 9.86 J of heat, and the temperature of the sample increases from 23.2°C to 30.5°C. Given that the specific heat capacity of aluminum is 0.90 the mass of the sample is: A 72 g B 65 g C 8.1 g 6.
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