(a)
Interpretation:
The power flux radiated by the Sun, in
Concept introduction:
The radiant energy is defined as the power per unit area. It is given by the expression as follows.
In the above equation,
(b)
Interpretation:
The total power emitted by the Sun, in watts, having surface area
Concept introduction:
The radiant energy is defined as the power per unit area. It is given by the expression as follows.
In the above equation,
(c)
Interpretation:
The number of joules of energy radiated in one year by the Sun is to be calculated.
Concept introduction:
The radiant energy is defined as the power per unit area. It is given by the expression as follows.
In the above equation,
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Chapter 9 Solutions
Bundle: Physical Chemistry, 2nd + Student Solutions Manual
- Microwave ovens heat food by the energy given off by microwaves. These microwaves have a wavelength of 5.00 3 106 nm. (a) How much energy in kilojoules per mole is given off by a microwave oven? (b) Compare the energy obtained in (a) with that given off by the ultraviolet rays (l <100 nm) of the Sun that you absorb when you try to get a tan.arrow_forwardFrom Einstein’s most famous equation, how much energy in British therrmal unit (btu) can theoretically be released from 38 moles of hydrogen gas? [1 btu=1055.056 joules], [1 Joule = 1kg m²/s²]arrow_forwardWhat would be the total energy output in joules (J) if every one of the atoms in 1.0 g of matter could be converted to pure energy? Use E = Δmc2 and c = 3.0 × 108 m s–1.arrow_forward
- (A) A photon has a wavelength of 599 nm. Calculate the energy of the photon in joules. Enter your answer in scientific notation. (b) what is the wave length (in nm) of radiation that has an energy content of 9.53 x 103 kJ/mol? (B part 2) in which region of the electromagnetic spectrum is this radiation found? (c) what are the possible values for ml when the principal quantum number (n) is 2 and the angular momentum quantum number is 0?arrow_forwardA cyclotron used to accelerate alpha-particles (m = 6.64×10−27kg, q = 3.2×10−19 C has a radius of 0.50 m and a magnetic field of 1.8 T. (a) What is the period of revolution of the alpha-particles? (b) What is their maximum kinetic energy?arrow_forwardDefine the terms in the expression: ln k = ln A – Ea/RTarrow_forward
- An electron in a hydrogen atom travels from energy level n = 2 to energy level n = 3. Would the electron be absorbing or emitting this energy in this transition? What is the change in energy (ΔE) for this transition? Show all work, including units and signs, and give your answer for ΔE to three significant figures.arrow_forward(c) The kinetic energy, Kr, of electrons emitted from a metal surface after irradiation with UV light of wavelength λ is given by: hc K₁=-=- where h is Planck's constant (6.626 x 10-4 Js), c is the speed of light in a vacuum (2.99 x 108 m s¹), and is the work function of the metal surface. In a specific experiment, light with a wavelength of 266 nm was used to irradiate a cadmium (Cd) metal surface. (i) Calculate the photon energy of the light used in the experiment, in Joules. (II) The work function for cadmium is 4.08 eV. Calculate the kinetic energy of the emitted electrons. [Note: 1 eV = 1.60 x 10-19 J.)arrow_forward6.9 The average distance between Mars and Earth is about1.3 × 108miles. How long would it take video imagestransmitted from the Mars Spirit rover on Mars’ surfaceto reach Earth (1 mile = 1.61 km)?arrow_forward
- W 4. (a) A laser emits light that has a frequency of 4.69 X 10¹4 s¹. What is the energy of one photon of this radiation? V (b) If the laser emits a pulse containing 5.0 X 1017 photons of this radiation, what is the total energy of that pulse? (c) If the laser emits 1.3 X 10-2 J of energy during a pulse, how many photons are emitted?arrow_forward(A) What is the wave length (in nanometers) of light having a frequency of 3.6 x 1013 Hz? (B) what is the frequency (in hertz) of light having a wavelength of 456 nm? (c) what is the frequency of light having a wave length of 147 nm? (d) what is the wave length (in meters) of radiation having a frequency of 9.64 x 107 Hz? (this is the type of radiation used by FM radio stations)arrow_forwardCalculate the kinetic energy in J of an electron moving at 6.00 × 106 m/s. The mass of an electron is 9.11 × 10-28 g.arrow_forward
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