Thermodynamics | MCQs

Explanation

Explanation

Joule is a unit of work or energy or heat.

Joule is a scalar quantity.

Explanation

• The SI unit of energy is the Joule (J).
• It is the unit of energy, work, and heat.

Explanation

Evaporation is the process where liquid turns into gas at temperatures below its boiling point.

It occurs at the surface of the liquid.

It is influenced by factors like temperature and surface area.

Explanation

The melting point of ice at normal atmospheric pressure is 0 °C (zero degrees Celsius).

Key Points:

• 0 K (zero Kelvin) is equivalent to -273.15 °C, which is absolute zero, the lowest possible temperature.
• 100 °C is the boiling point of water at normal atmospheric pressure.

Explanation

• Antoine Lavoisier, a French chemist, is credited with discovering the law of conservation of mass in 1789 (1785).
• He demonstrated that matter cannot be created or destroyed in a chemical reaction, only transformed from one substance to another.

Explanation

Kinetic energy is the energy an object possesses due to its motion.

The faster the object moves, the more kinetic energy it has.

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Explanation