Some solar-heated homes use large beds of rocks to store heat. (a) How much heat is absorbed by 100.0 kg of rocks if their temperature increases by 12°C? (Assume that c = 0.82 J / g ⋅ °C .) (b) Assume that the rock pile has total surface area 2 m 2 . At maximum intensity near the earth's surface, solar power is about 170 watts/m 2 . ( 1 watt = 1 J / s . ) How many minutes will it take for solar power to produce the 12°C increase in part (a)?
Some solar-heated homes use large beds of rocks to store heat. (a) How much heat is absorbed by 100.0 kg of rocks if their temperature increases by 12°C? (Assume that c = 0.82 J / g ⋅ °C .) (b) Assume that the rock pile has total surface area 2 m 2 . At maximum intensity near the earth's surface, solar power is about 170 watts/m 2 . ( 1 watt = 1 J / s . ) How many minutes will it take for solar power to produce the 12°C increase in part (a)?
Solution Summary: The author explains how the time taken for solar power to produce a temperature increase is calculated.
Some solar-heated homes use large beds of rocks to store heat.
(a) How much heat is absorbed by 100.0 kg of rocks if their temperature increases by 12°C? (Assume that
c
=
0.82
J
/
g
⋅
°C
.)
(b) Assume that the rock pile has total surface area 2 m2. At maximum intensity near the earth's surface, solar power is about 170 watts/m2.
(
1
watt
=
1
J
/
s
.
)
How many minutes will it take for solar power to produce the 12°C increase in part (a)?
In the solid state, oxalic acid occurs as
a dihydrate with the formula H2C2O4
C+2H2O. Use this formula to
calculate the formula weight of oxalic
acid. Use the calculated formula
weight and the number of moles
(0.00504mol)
of oxalic acid in each titrated
unknown sample recorded in Table
6.4 to calculate the number of grams
of pure oxalic acid dihydrate
contained in each titrated unknown
sample.
1.
Consider a pair of elements with 2p and 4p valence orbitals (e.g., N and Se). Draw their
(2p and 4p AO's) radial probability plots, and sketch their angular profiles. Then, consider these
orbitals from the two atoms forming a homonuclear л-bond. Which element would have a
stronger bond, and why?
(4 points)
Write the reaction and show the mechanism of the reaction. Include the mechanism
for formation of the NO2+
2. Explain, using resonance structures, why the meta isomer is formed. Draw possible
resonance structures for ortho, meta and para.
Chapter 8 Solutions
Bundle: Chemistry: Principles and Reactions, 8th, Loose-Leaf + OWLv2, 1 term (6 months) Printed Access Card
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