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pogonyaev
3 years ago
13

Microwave ovens emit microwave energy with a wavelength of 12.7 cm. what is the energy of exactly one photon of this microwave r

adiation?
Chemistry
1 answer:
Maksim231197 [3]3 years ago
4 0
The energy of a photon is equal to the  product of planck's constant,h and speed of light,c over the wavelength,y. Hence, e=h*\frac{c}{y}. h is equal to 6.6261*10^-34 Js, c is equal to 3*10^8 m/s and y= 12.7 cm or 0.127 m. Substituting, energy is equal to 1.5652*10^-24 Joules.
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how much heat energy is needed to raise the temperature of 78.4g of aluminum from 19.4 degrees c to 98.6 degrees c.
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 The heat that is needed  to raise the   temperature  of 78.4 g of aluminium from 19.4 °c to 98.6°c  is    5600.77 j

 <u><em>calculation</em></u>

Heat(Q) = mass(M) x  specific heat capacity (C) x change in temperature(ΔT)


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