The first law of thermodynamics, also known as the law of energy conservation, protects energy. It states that energy cannot be created or destroyed, only transformed from one form to another.
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Steam burns hands more than boiling water because steam contains latent heat. When steam condenses on the skin, it releases this latent heat, transferring more energy to the skin compared to boiling water at the same temperature. This additional heat ...
The latent heat of vaporization of water is 536 Cal/g. This value represents the amount of heat required to convert 1 gram of water at its boiling point into steam without a temperature change.
The latent heat of melting of ice is 80 Cal/g. This value represents the amount of heat required to convert 1 gram of ice at its melting point into water without changing its temperature.
The heat required to change a unit mass of a solid substance from solid to liquid at its melting point is called the latent heat of melting of solid. This energy is needed to break the bonds holding the solid ...
The emitted or absorbed heat which changes the state of the substance but does not cause any change in temperature is called latent heat. This energy is used for phase transitions, such as melting or boiling, without altering the substance’s ...
Water on mountains starts boiling at a temperature less than 100°C due to the lower atmospheric pressure at higher altitudes. The reduced pressure decreases the boiling point of water, causing it to boil at temperatures below 100°C.
Due to impurities, the boiling point (B.P) of a liquid increases. This phenomenon is known as boiling point elevation and is a colligative property. The presence of impurities lowers the vapor pressure of the solution, requiring a higher temperature for ...
Mercury is generally used in thermometers because it has high density. Its high density allows for precise and easily readable measurements due to the small size of the thermometer’s scale. Additionally, mercury’s low freezing point and wide liquid range make ...
The point at which the Fahrenheit temperature is double the Celsius temperature is -40 °F. At this temperature, -40 °F is equal to -40 °C.