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State the condition under which a microwave oven heats up a food item containing water molecules most efficiently?
Wiki User
∙ 10y ago
Many molecules (such as those of water) are electric dipoles, meaning that they have a positive charge at one end and a negative charge at the other, and therefore rotate as they try to align themselves with the alternating electric field induced by the microwaves. This molecular movement creates heat as the rotating molecules hit other molecules and put them into motion. Microwave heating is most efficient on liquid water, and much less so on fats and sugars (which have less molecular dipole moment), and frozen water (where the molecules are not free to rotate).
Wiki User
∙ 10y ago
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What energy transfer takes place with a microwave?
In a microwave oven, energy is transferred from the emitter (which is technically a klystron) to the water molecules in the item being heated, which have a resonant frequency equal to that of the microwave emission.
What is the energy transformation of a microwave?
It transforms electrical input energy into microwave EM radiation, this radiation then agitates water molecules in food to raise the temperature.
What are the properties of water molecules that enables microwaves?
This question is probably asking about microwave ovens. Water molecules have a net dipole moment, and microwave radiation causes them to rotate as the dipoles interact with the electromagnetic field. This increased motion of the water molecules translates into heat as they bump into other molecules and each other. Other polar molecules such as proteins are also affected in a similar way.
What happens in a microwave?
A microwave is simply an instrument for producing microwaves ( these are similar to that of infra-red and radio waves), these microwaves that are produced in the microwave itself has the same wavelength of water and allows water molecules to vibrate. The increase in energy of these water molecules (the kinetic energy) can then be transfered (as energy is never created or destroyed) into heat energy. Therefore heating up the food/drink or what ever you are placing in the microwave, this is essentially how it works.
What is the definition of adhesion force?
Adhesion force is the force of attraction between molecules of different kind. Eg.adhesion force exists between the molecules of water and the molecules of its containing vessel.
What is aim of the microwave?
To hit molecules (usually sugars, fats, water or other molecules containing hydrogen) and spin them. This kinetic energy is then turned to heat. Microwaves are one of the most efficient ways of heating substances.
What is the decomposition of nitrogen containing molecules into ammonia?
Ammonification is the decomposition of nitrogen containing molecules into ammonia.
What food molecules do when penetraded by microwave?
Microwave energy excites the molecules of the food. This generates friction and heat at the molecular level. When food is heated, it causes the molecules to speed up, so artificially speeding up the molecules causes heat to be produced.
How do you determine the molecule is microwave active or inactive?
It is determined by whether the molecule is polar or nonpolar. Nonpolar molecules do not absorb radiation in the microwave region; therefore, they are microwave inactive. Polar molecules are microwave active.
What are the simpler organic molecules?
Those molecules containing ONE Carbon atom
Why does ivory soap explode in the microwave?
the air molecules spread out
How do microwave enable water to be heated in microwave ovens?
The microwaves excite rotational modes in molecules that have an electric dipole. Water molecules have a dipole because oxygen is more electronegative than hydrogen and the molecules are bent (H-O-H angle about 105 degrees).
Where did the name Organic chemistry come from?
organic refers to all molecules containing carbon.. organic chemistry is the study of all carbon containing molecules
Why wont a microwave melt when its heating food?
Microwave ovens work by exciting water molecules and polarized molecules within the food, such as fats and sugars. There are none of these in the microwave's internal casing, which is also resistant enough to the heat produced during operation.
What is a substance containing molecules and ions?
Water: H2O molecules, H+ and OH- ions
How does cooking happen in a microwave?
When food is placed inside the microwave oven, the microwave released will 'agitate' the water molecules in the food, which causes heat to be produced, which then cooks the food.
What food molecules do when penetrated by microwave's Lettered word?
What food molecules do when penetrated by microwaves (7 lettered word)
