Question

1)Почему перед началом кипения воды слышен характерный шум? а) всплывающие пузырьки с насыщенным паром схлопываются б) шум объясняется очень быстрым ростом пузырьков в) шум объяснятся отрывом пузырьков от дна сосуда 2) При кипении температура жидкости а) увеличивается б) уменьшается в) не меняется 3) Может ли вода кипеть при температуре выше 100 C? а) не может, т.к 100 С - это температура кипения воды б) может, если нагревать выделяет очень много тепла в) может, если атмосферное давление больше нормального

Answer 1

2 при кипении температура жидкости увеличивается

Answer 2

Why is there a characteristic sound before water boils?

The characteristic sound before water boils is primarily due to the formation and collapse of bubbles in the water. As the water is heated, it reaches a point where the vapor pressure inside the liquid is equal to the atmospheric pressure above it. At this point, bubbles of water vapor start to form and rise to the surface. However, as the bubbles rise, the pressure decreases, causing the bubbles to collapse or implode, creating a characteristic sound. This process is known as cavitation. [[1]] [[2]]

Does the temperature of the liquid increase during boiling?

Yes, the temperature of the liquid increases during boiling. When a liquid reaches its boiling point, it undergoes a phase change from a liquid to a gas. During this phase change, energy is absorbed by the liquid, which causes an increase in temperature. However, once the liquid reaches its boiling point, the temperature remains constant until all the liquid has vaporized. This constant temperature is known as the boiling point and is specific to each substance. For water, the boiling point is 100 degrees Celsius at standard atmospheric pressure. [[3]] [[4]]

Can water boil at a temperature higher than 100 degrees Celsius?

Yes, water can boil at a temperature higher than 100 degrees Celsius under certain conditions. The boiling point of water is influenced by the atmospheric pressure. At standard atmospheric pressure, water boils at 100 degrees Celsius. However, if the atmospheric pressure is increased, such as in a pressure cooker, the boiling point of water also increases. Conversely, if the atmospheric pressure is decreased, such as at high altitudes, the boiling point of water decreases. This is why it takes longer to cook food at higher altitudes, where the boiling point of water is lower than 100 degrees Celsius. [[5]]