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Anonymous users2024-01-24A. Open the vinegar bottle and quickly smell the sour smell of vinegar, which is a diffusion phenomenon, indicating that the molecules are moving irregularly, and this option is correct and does not conform to the topic;
B. The pressure cooker is well sealed, the internal pressure is strong, and the boiling point of the water is high, so the food will be cooked faster, so the pressure cooker is to increase the pressure of the gas in the pot and increase the boiling point of the water to increase the temperature in the pot.
C. Open the lid of the pot and see the "white gas", which is a small water droplet formed by the condensation of the water vapor with a high temperature coming out of the pot, which belongs to the liquefaction phenomenon.
D. Boiling water with a gas stove uses heat transfer to change the internal energy of the object, which is incorrect and in line with the topic
Therefore, BCD is chosen
A. When stir-frying, the temperature of the dish is high, and the speed of molecular movement is related to the temperature, the higher the temperature, the faster the movement speed, and the faster the diffusion is correct >>>More
A. The "white gas" seen when opening the lid of the pot is formed by the water vapor in the air when it is cold and the heat is released into small water droplets suspended in the air, which is a liquefaction phenomenon, so A is wrong; >>>More
A. Boiling water with a gas stove is to use heat transfer to change the internal energy of water, so A is wrong; >>>More
Multiple choice: You can only select one.
B: Cooking rice in a pressure cooker – it's right to increase the boiling point of water by increasing the pressure!! >>>More
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