Gas laws
Thermochem
Quantum
Concepts
100
Ideal Gas Law
100
Heat is entering the system
Endothermic
100
Planck's constant
6.63x10^-34 J*s
100
Height or magnitude of peaks and troughs of a wave
Amplitude
200
The volume of a gas with a pressure of 1.2 atm increases from 1.0 L to 4.0 L. What is the final pressure of the gas, assuming constant temperature.
HINT: what is Boyle's law?
0.3 atm
200
How many calories are required to raise the temperature of a 35g sample of iron from 25 C to 35 C? Iron has specific heat of 0.106 cal/g*C
37 cal
200
A prism emits a wavelength of 473 nm. What is the frequency of the wavelength if it travels at the speed of light? Which color of light is it emitting?
6.34x10^14 Hz; 473 nm Blue
200
Which of these are diamagnetic?
O, Fe, He, N, Mg
He, Mg
300
At 570 mmHg and 25 C, a gas sample has a volume of 2270 mL. What is the final pressure (in mmHg) at a volume of 1250 mL and a temperature of 175 C
1560 mmHg
300
Determine the unknown mass of steam that is required to increase its temperature from 150 C to 210 C by the action of 1250 J of energy.
(specific heat of water = 4.184 J/g*C, specific heat of steam = 2.010 J/g*C), specific heat of ice = 2.090 J/g*C)
10.36 g of steam
300
What is the energy of a radioactive shrimp that has a wavelength of 1.88 pm?
1.06x10^-13 J
300
A metal surface has a threshold frequency of X Hz. A laser shines light with a frequency of 4X Hz onto the surface. What is likely to happen according to photoelectric effect? What does frequency affect?
Electrons will be etched from surface; Frequency affects velocity of which electrons are etched
400
In a gas mixture of 35% He and 65% O2 the total pressure is 800 mmHg. What is the partial pressure of O2?
520mmHg
400
H2 (g) + Cl2(g) ---> 2 HCl (g) + delta H
Exo or endothermic?
exothermic
400
What is the wavelength of light emitted when the hydrogen atom undergoes a transition from level n=5 to n=2?
434 nm
400
When you enter a sauna, the temperature of steam lowers as your body temperature rises. This is because energy is being transferred to your body which causes condensation.
If your body is the system and the sauna is the surrounding, is this endo or exothermic?
Endothermic
500
A sample of helium has a volume of 480 mL at 47 C and 740 mmHg. The temperature is lowered to 22 C and the pressure to 625 mmHg. What is the new volume?
524 mL
500
Calculate the change in enthalpy of reaction using standard enthalpies of formation.
C2H4(g) +3 O2 (g) ---> 2CO2 (g) + 2 H2O (l)
Standard ΔH°f C2H4(g): +52.5 kJ/mol ; O2(g): 0kJ/mol ; CO2 (g): −393.5 kJ/mol ; H₂O (l) −285.8 kJ/mol
ΔHrxn= -1411.1 kJ
Is this endo or exothermic?
500
What element would have an electron with the following quantum numbers?
n= 5, l = 1, ml = 0, ms= -1/2
Iodine
500
According to Charles' law, volume of gas ___ when ___ decreases
Volume decreases when temperature decreases