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When heating a beaker of H20 on a hot plate there are 3 types of energy conversions?
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When ice on a plate melts why does the plate cool down as well?
When ice is placed on a plate that is warmer than the ice, some of the heat energy from the plate is transferred to the ice. (This is due to the molecules in the plate transferring kinetic energy to those in the ice. The molecules in the plate crash into those in the ice, losing speed and giving the molecules in the ice more speed). Since the heat energy is transferred away from the plate, the plate cools down. (The ice is not cooling down, it is heating up.)
What two forms of energy could best be used to increase the temperature of a sheet of copper?
heat and light
What energy change take place when a plate drop on floor?
The kinetic energy of the falling plate is used up in smashing the plate along with some energy converted to noise (sound energy).
A beaker containing 400g of water has 1200 J of work done on it by stirring and 200 cal of heat added to it from a plate What is the change in the internal energy of the water in Joules?
Both the stirring and the heat energy added will increase the internal energy, so all you need to do is add both together. Don't forget to convert the calories to joules first.
Does a microwave use light energy?
yes its does because when the microwave is on and the plate is rotating,the light is actually heating the food. It is not the visible light that does the heating, that is provided simply so you can see inside the oven. It is the microwaves that do the heating, by agitating molecules of water in the food. That's why you can't heat dry food in microwave oven. The microwaves are EM radiation like visible light, but a different wavelength.
Lisa had an unknown clear liquid in a beaker. After heating on a hot plate the liquid evaporated but a white solid was left inside the beaker. Based on Lisa's investigation the original clear liquid?
The liquid was a solution.
Is heating a flask on a hot plate an example of activation energy beginning to react?
No, heating a flask on a hot plate is not an example of activation energy beginning to react. Activation energy refers to the minimum amount of energy required for a chemical reaction to occur, and it is not related to heating a flask. Heating a flask on a hot plate simply refers to the process of applying heat to the flask, which can facilitate a reaction by increasing the temperature and providing the necessary energy for the reaction to proceed.
Name 2 pieces of equipment you can use to boil a beaker of water in the lab?
a hot plate and a beaker
What tools will you need to boil water?
hot plate and a beaker
When ice on a plate melts why does the plate cool down as well?
When ice is placed on a plate that is warmer than the ice, some of the heat energy from the plate is transferred to the ice. (This is due to the molecules in the plate transferring kinetic energy to those in the ice. The molecules in the plate crash into those in the ice, losing speed and giving the molecules in the ice more speed). Since the heat energy is transferred away from the plate, the plate cools down. (The ice is not cooling down, it is heating up.)
What two forms of energy could best be used to increase the temperature of a sheet of copper?
heat and light
How do you remove a brass disc fitted into a steel plate by cooling or heating?
by heating
What plate motion due to the heating and cooling of rocks?
convection
Plate motion due to the heating and cooling of rocks?
Convection
How do you set up a hot water bath in chemistry?
fill up a beaker about 3/4 of the way up. Then turn on the hot plate and place the beaker on top of it. Set the hot plate to high (or 10) and wait for the water to boil. When the water is done boiling, turn down the hot plate to about 7 to maintain the temperature
What energy change take place when a plate drop on floor?
The kinetic energy of the falling plate is used up in smashing the plate along with some energy converted to noise (sound energy).
What apparatus are used in a heating setup?
Bunsen burner tripod stand evaporating dish wire gauze
