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
A 13. D 14. B 15. D 16. D 17.
Your Answer: b. Two mole s of thios ulfate anion ne e de d to re act
3. Based on your answers, why is it warmer in summer than in winter? It is warmer in the summer then in the winter because the Earth’s tilt is
G. Use the concept of chemical potential energy to summarize why chlorophyll absorbs the wavelengths of light it does.
5. A) What would you expect to happen to the temperature on Earth if the amount of energy radiated by Earth increased but the amount coming from the Sun stayed the same?
“The period of the wave is 4.0m”, is wrong. Wavelength is the length of one period and its different with period. The unit of period is (s).
Ionization of an element in group 2A requires the removal of an electron from an s orbital, where as the ionization of an element in group 3A requires the removal of an electron from a p orbital. The elements in group 3A has a __________ ionization energy than the elements in group 2A.
3. The body changes energy, ATP, into kinetic energy making the body move or thermal energy to keep it warm.
Wien’s law: max = W/T where max = wavelength in metres, T = temperature (kelvin) W = Wien’s constant = 2.89 x 10-3 mK
(A) Assume H is the number of hours Mr. Maxwell wrote. The equation represents this:
How does the color of your house affect the temperature inside of it? The clothes you wear is an example of this. On a hot sunny day you would rather wear a light colored shirt. If you were to wear a dark colored shirt you would get warmer quicker than if you were in a light colored shirt. Since light
4. As the temperature increases, the average kinetic energy of gases increases and when the temperature decreases, the average kinetic energy of gases decreases.
But, from (b) it can be observed that heat Q1 follows a loop though HE and HP and perform no function. The equivalent system thus can be shown as figure. From fig. (c) it is obvious the heat is being transferred from low temperature, thermal energy reservoir to high temperature thermal energy reservoir, without any external work. It is therefore violation of Clausius statement. Thus, violation of Kelvin Plank’s and we can say, the two statements are equivalent.
1. air temperature decreases with height because less reflected light from surface reaches the high atmosphere. (close, actually heat is conducted to air from ground)
Heat is a form of energy that is transferred between two substances at different temperatures. The flow of the energy is from the object of higher temperature to the object of lower temperature. The heat is measured in units of energy, usually calories or joules. Temperature on the other hand, is how cold or hot an object is. The temperature is the average kinetic energy per molecule of a substance. This is measured in degrees on the Celsius or Fahrenheit or in Kelvins.