The principle and original interpretation of the new lunch box instant hot lunch box ?

At present, there is a new type of lunch box "instant hot lunch box" on the market, the principle of which is that there are two layers at the bottom of the lunch box, one layer stores water, and the other layer stores the mixture of magnesium and iron When the isolation layer is opened, the following reaction occurs: mg+2H2O x+H2 According to the above information, the following problems occur: (1) The principle of "instant heat" at the bottom of the lunch box is to convert chemical energy into heat (or internal) heat (or internal) energy; (2) Knowing that X is a base, please write the chemical formula of X mg(OH)2 mg(OH)2, and you infer the chemical formula of X on the basis of the law of conservation of mass Law of Conservation of Mass Test point:

Calculations and inferences of chemical formulas; the change in energy when a substance undergoes a chemical change; The Law of Conservation of Mass and Its Application Special Topic: Chemical Formula Inference Cross Method Analysis: (1) According to the mixture of water stored in one layer and magnesium and iron in the other layer When the isolation layer is opened when used, a chemical reaction occurs to analyze the change in energy; (2) Use the law of conservation of mass and the chemical reaction equation to infer the chemical formula of x Answer:

Solution: (1) Because the isolation layer is opened during use, the chemical reaction between magnesium metal and water occurs, and the reaction releases heat and converts chemical energy into heat energy (or internal energy), so the answer is: heat (or internal); 2) From the reaction is mg+2h2o x+h2, according to the law of conservation of mass, it can be seen that the type and number of elements and atoms before and after the reaction remain unchanged, there are 1 magnesium atom, 4 hydrogen atoms, and 2 oxygen atoms before the reaction, then there are 1 magnesium atom, 4 hydrogen atoms, and 2 oxygen atoms after the reaction, and there are already 2 hydrogen atoms after the reaction, then x contains 1 magnesium atom, 2 hydrogen atoms, and 2 oxygen atoms, and x is a base, then the chemical formula is mg(oh)2, so the answer is:

mg（oh）2；The law of conservation of mass

Calcium oxide reacts with water to release heat.

The self-heating type of boxed meal is a chemical reaction of a heating agent to produce heat energy, and the meal is heated through the thermal reaction. The result of the reaction of the hydration bladder inside the lunch box and the heating agent packaged in a non-woven fabric. Once the plastic strip is pulled, the water bag will be broken, and then the heating agent will have a chemical reaction when it meets the water lifting key, resulting in uniform heat dissipation of the heating agent, generating up to 120 heat.

After 5-8 minutes, the temperature of the eaten meal reaches 55-70, and then you can eat a delicious meal.

An electric lunch box is an easy-to-use household appliance that is typically used to store and keep warm meals or soups. The proper use of electric lunch boxes can not only ensure the safety and deliciousness of food, but also extend the life of electrical appliances. Here's the right way to use an electric lunch box.

1.Check before use.

Before using the electric lunch box, please check whether the wires and plugs are normal, and check that the inside of the lunch box is clean and odorless. It is also important to keep the inside and outside of the lunch box clean, using a food-grade pipe cleaner or mild soapy water. Some electric lunch boxes come with removable parts that make them easier to clean.

2.Prepare before heating food.

Before heating the food, please put the food in the container of the lunch box and fill the ridge to the highest point of the container as much as possible, so that the temperature can be better maintained. Do not put oil or water in a container before heating food to avoid water spilling due to boiling.

3.Operations to heat food.

Once the container is loaded into the electric lunch box, close the lid and install the power plug to the hot lunch box socket. Heat at high or low temperatures as needed. Usually, the heating time is about 20-30 minutes, do not exalt the heat for more than 45 minutes.

Once the food has reached the desired temperature, the plug can be unplugged and the plug can be held in your hand to avoid placing the fork on the wire surface at the bottom.

4.Cleaning and storage after use.

After using the electric lunch box, remove the food from the container, pour out any soup, meals, etc. that remain in the container, and then wash the container. Avoid using sharp or hard objects when cleaning the interior of the lunch box, use soft sponges and mild detergents, and avoid using detergents that contain acids or are highly corrosive.

5.Maintenance and maintenance.

When using the electric lunch box for a long time, please dust it regularly, clean it, and check whether the accessories and wiring are normal. When the electric lunch box is not in use, remove the power plug and store it in a fresh, dry environment away from moisture and direct sunlight.

The above is the correct way to use the electric lunch box, read the instructions carefully before use and handle it correctly according to the operation method, which ensures the safety of operation and long-term service life.