What will take the most energy?
(Constants: Heat of fusion of water: 334 J/g
Heat of vaporization of water: 2260 J/g
Specific heat capacity of copper: 0.385 J/g*C
Specific heat capacity of gold: 0.129 J/g*C
Specific heat capacity of water: 4.18 J/g*C)
a. |
Increase the temperature of 10 grams of solid gold by 15 degrees |
b. |
Increase the temperature of 10 grams of solid water (ice) by 12 degrees |
c. |
Evaporate 10 grams of water |
d. |
Increase the temperature of 10 grams of copper by 15 degrees. |
e. |
Freeze 10 grams of water. |
Which statement about light is true?
a. |
It oscillates back and forth between wave and particle-like behavior. |
b. |
It exhibits both wave and particle-like behavior at the same time. |
c. |
It has neither wave nor particle-like behavior. |
d. |
It behaves as a particle only. |
e. |
It behaves as a wave only. |
According to the Aufbau principle, the orbitals that electrons will occupy first will be
a. those in the p subshell
b. The ones with electron density farthest from the nucleus
c. the highest energy orbitals
d. those in the d subshell
e. the lowest energy orbitals
True or False: According to Arrhenius's theory, all acids increase the hydrogen ion concentration in water.
1) The heats involved in each case are calculated:
a) q = m * cs * ΔT = 10 * 0.129 * 15 = 19.35 J
b) q = 10 * 2.09 * 12 = 250.8 J
c) q = 2260 * 10 = 22600 J
d) q = 10 * 0.385 * 15 = 57.75 J
e) q = 334 * 10 = 3340 J
Option C.
2) Option B. The light exhibits a wave-particle behavior.
3) Option c. The orbital of greater energy is filled first.
4) True. Arrhenius acids grant H + ions.
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