Multiple Choice

Decent Essays

1. Which of the following statements about heat is false? A) If heat flows into a system, the extra energy of the system appears in the form of internal energy. B) A hot object possesses more heat than a cold object. C) If the system and surroundings are in thermal equilibrium, there is no heat flow between them. D) A process in which heat flows out of a system is said to be exothermic. E) Heat is a form of energy flow. B is false. If you compare a cup of water at 25oC and a bath tub of water at 20oC, the cup of water may be warmer, but there are many fewer atoms than the bathtub of water, so there can actually be more heat in a colder object, but it is spread out throughout many more atoms so the temperature can be lower. …show more content…

X rays have the shortest wave length and frequency is inversely proportional to the wavelength so it has the highest frequency, therefore x-rays will be first in the list. Ultraviolet has the next highest being of shorter wavelength than visible light. Infrared is of longer wavelength than visible light and microwaves are some of the longest wavelengths of electromagnetic radiation. 9. What is the frequency of a photon having an energy of 8.56 x 10-16 J? (c = 3.00 x 108 m/s, h= 6.63 x 10-34 J • s) A) 3.88 x 1026 Hz B) 2.32 x 10-10 Hz C) 1.29 x 1018 Hz D) 2.58 x 10-27 Hz E) 2.57 x 10-7 Hz The answer is B. Energy = planks constant * wavenumber and wave number = speed of light divided by frequency so energy = planks * speed of light / frequency or E = h*(c/v) and we rearrange to solve for v so V = h * c / E = (6.63*10-34) * (3*108) / 8.56 * 10-16 = 2.32 x 10-10 s-1 also known as Hz 10. The number of orbitals having a given value of l is equal to A) 2n + 1 B) 2l + 1 C) n + ml D) 2ml + 1 E) l + ml B is the correct answer. For an s orbital, l = 0 and there is 1 s sub orbital. For p orbitals l = 1 and

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