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Why does a food item containing water molecules more efficiently heat up in a microwave oven?
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State the condition under which a microwave oven heats up a food item containing water molecules most efficiently?
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).
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 a substance containing molecules and ions?
Water: H2O molecules, H+ and OH- ions
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).
An experiment tested microwave-heated water to water plants and the plants died. This suggests that the microwave did something to the water to make it harmful. Is microwave heated water harmful?
All a microwave does is send microwaves through objects and speed up the molecules. The reason the plants died is because the water was hot.
What material in the potato absorbs microwaves?
Water molecules vibrate under microwave spectrum of radiation. So any food thrown in the microwave is heated up mainly by water molecules getting excited and colliding into other particles.
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.
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 is aquametry?
Did u mean microwave aquametry . Electromagnetic wave interaction with water-containing materials.
What heat transfer uses electromagnetic waves to increase thermal energy?
Microwave Radiation is Very Effectively absorbed by Water molecules, this results in the increased thermal agitation of the Water molecules that absorb the Mw radiation - as found in Microwave ovens.
What microwave stands for?
Microwaves use microwave radiation to cause water molecules to move rapidly and generate heat. It doesn't stand for anything.
How microwave warms up food?
Microwave radiation excites water and fat molecules, increasing their Brownian motion, thereby increasing their temperature.
