A liquid is exposed to infrared radiation with a wavelength of 8.94×10−4 cm.8.94×10−4 cm. Assume that all the radiation is absorbed and converted to heat. How many photons are required for the liquid to absorb 23.02 J23.02 J of heat?

It requires 799 kJ of energy to break one mole of carbon-oxygen double bonds in carbon dioxide. What wavelength of light does this correspond to per bond? Is there any transition in the hydrogen atom that has at least this quantity of energy to one photon?

6.17 The laser in most supermarket barcode scanners operates at a wavelength of 632.8 nm. What is the energy of a single photon emitted by such a laser? What is the energy of one mole of these photons?

This laser emits green light with a wavelength of 533 nm. (a) What is the energy, in joules, of one photon of light at this wavelength? (b) If a particular laser produces 1.00 watt (W) of power (1 W = 1 J/s), how many photons are produced each second by the laser?

The light produced by a red neon sign is due to the emission of light by excited neon atoms. Qualitatively describe the spectrum produced by passing light from a neon lamp through a prism.

6.101 Laser welding is a technique in which a tightly focused laser beam is used to deposit enough energy to weld metal parts together. Because the entire process can be automated, it is commonly used in many large-scale industries, including the manufacture of automobiles. In order to achieve the desired weld quality, the steel parts being joined must absorb energy at a rate of about 104 W/mm2. (Recall that 1 W = 1 J/s.) A particular laser welding system employs a Nd:YAG laser operating at a wavelength of 1.06m ; at this wavelength steel will absorb about 80% of the incident photons. If the laser beam is focused to illuminate a circular spot with a diameter of 0.02 inch, what is the minimum power (in watts) that the laser must emit to reach the 104 W/mm2 threshold? How many photons per second does this correspond to? (For simplicity, assume that the energy from the laser does not penetrate into the metal to any significant depth.)

Water (c = 4.184 J/g×oC) is exposed to infrared radiation of wavelength 2.8 × 10−4 cm.  Assume that all the radiation is absorbed and converted to heat.  How many photons will be required to raise the temperature of 2.0 g of water by 2.0 K?

A liquid is exposed to infrared radiation with a wavelength of 2.74 x 104 cm. Assume that all the radiation is absorbed and converted to heat. How many photons are required for the liquid to absorb 39.52 J of heat?

Water is exposed to infrared radiation of wavelength 2.9×10−4 cm . Assume that all the radiation is absorbed and converted to heat. How many photons will be required to raise the temperature of 2.0 gg of water by 1.9 K ?

A container with 0.2450.245 L of water is placed in a microwave and radiated with electromagnetic energy with a wavelength of 10.510.5 cm. The temperature of the water rose by 69.969.9 °C. Calculate the number of photons that were absorbed by the water. Assume water has a density of 1.00 g⋅mL−11.00 g·mL−1 and a specific heat of 4.184 J⋅g−1⋅°C−14.184 J·g−1·°C−1.   number of photons =__________________________________photons