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☆☆☆☆☆Cards in this guide (14)
What equation is used to calculate the energy of a photon
Energy = hc/λ
h = Planck's constant (6.626 × 10-34 m2 kg/s)
c = the speed of light (3.00 × 108 m/s)
λ = the wavelength
Example question: What is the energy of a photon with a wavelength of 700 nm?
Convert the wavelength to meters (1 nm = 10-9 m)
700 nm = 700 × 10-9 m
Energy = (6.626 × 10-34)(3.00 × 108) ÷ (700 × 10-9) = 2.84 × 10-19 J
Which phase has the highest entropy
Gas
What does it mean for heat to be transferred by radiation
Energy is transferred when molecules absorb electromagnetic waves.
Which statement describes a reaction at 298 K if H 31 kJ mol S 0.093 kJ molK
It is not spontaneous.
Which of the following shows that the combustion of methane produces 802 kJ mol of energy
CH4(g) + 2O2(g) CO2(g) + 2H2O(g) + 802 kJ/mol
What determines how fast a reaction happens
Kinetics
What could the fourth quantum number of a 2s2 electron be
ms= +1/2
What is the value for G at 300 K if H 27 kJmol and S 0.09 kJmolK
G = 0 kJ/mol
What does S0 mean
the system has become more random
What is the wavelength of a light of frequency 4.47 X 1014 Hz
The wavelength is 671 nm.
How much energy is generated from freezing 2.5g water
0
What phase has the lowest entropy
solid-apex
What can be said about a reaction with triangle H 620 kJmol and triangle S -046 kJ(mol.K)
it is never spontaneous
A rocket uses an engine that creates thrust through the combustion of a liquid fuel and an oxidizer. What kind of rocket is this
Chemical rocket
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