Homework Help: chemistry

Posted by jimmercarbone on Wednesday, October 31, 2012 at 9:24am.

A microwave oven heats by radiating food with microwave radiation which is absorbed by the food and converted to heat. Suppose an oven's radiation wavelength is 12.5 cm. A container with 0.250 liter of water was placed in the oven and the temperature of the water rose from 20 degrees celsium to 100 degrees celsium. How many photons of this microwave radiation were required. Assume that all energy from the radiation were used to raise the temperature of teh water

chemistry - DrBob222, Wednesday, October 31, 2012 at 2:44pm
E per photon = hc/wavelength
Convert 12.5 cm to m and solve for E.
(note: 12.5 cm = 0.125m)

How much total energy did the water absorb. That's mass H2O x specific heat H2O x (Tfinal-Tinitial).
Eper photon x # photons = total E H2O.
Solve for # photons.

Answer this Question

Related Questions

CHEMISTRY - I don't even understand how this question works. How do I solve ...
chemistry - A microwave oven heats by radiating food with microwave radiation ...
Chemistry - microwave ovens work by irradiating food with microwaves, which is ...
chemistry 121 - Microwave ovens use microwave radiation to heat food. The ...
chemistry 121 - Microwave ovens use microwave radiation to heat food. The ...
Chemistry! - Hey jiskha. Microwave ovens emit microwave radiation that is ...
More chemistry - Hey jiskha. Microwave ovens emit microwave radiation that is ...
chemistry - Microwaves are used to heat food in microwave ovens. The microwave ...
Chemistry - Microwave radiation is absorbed by the water in food. As the water ...
Chemistry - Microwave radiation is absorbed by the water in food. As the water ...

For Further Reading

First Name:
School Subject:
Answer: