H
hlh6591
Guest
A typical microwave oven uses radiation with a 12.2 cm wavelength
a)How many moles of photons of this radiation are required to raise the temperature of 405 g of water from 26.5°C to 99.8°C?
Correct Answer: 127000 mol photons
b) The watt is a unit of power-the rate at which energy is delivered or consumed: 1 W = 1 J/s. Assume that all the energy of a 760 W microwave oven is delivered to the heating of water described in (a). How long will it take to heat the water?
a)How many moles of photons of this radiation are required to raise the temperature of 405 g of water from 26.5°C to 99.8°C?
Correct Answer: 127000 mol photons
b) The watt is a unit of power-the rate at which energy is delivered or consumed: 1 W = 1 J/s. Assume that all the energy of a 760 W microwave oven is delivered to the heating of water described in (a). How long will it take to heat the water?