Question

Explain briefly, Why does heat flow from a body at higher temperature to a body at lower temperature.

Answer 1

Heat flows from the hot to the cold object until they are both at the same temperature. The slower molecules gain more thermal energy and collide with other molecules in the cooler object. This is as per the 2nd law which applies to the spontaneous flow of heat from hot to cold. It is possible, of course, to make a cool object in a warm place cooler - this is what a refrigerator does - but this involves the input of some external energy.

Answer 2

Answer:

The entropy of a hot body is more than that of a cold one. energy will always be transferred from the hotter to the cooler object. The objects will exchange thermal energy, until thermal equilibrium is reached,

Hence statement is true

Explanation:

• It combine two gases, each of which has a distinct starting temperature. Gas molecules in higher-than-lower temperatures travel more quickly. The molecules of two different gases come into contact with one another. The slower molecules receive a portion of the energy from the quicker molecules.
• Both gases' temperatures gradually converge. Entropy, often known as the second law of thermodynamics, is the term used to describe the natural propensity for the spread of energy. Entropy rises each time energy moves from a smaller to a larger space (either with more matter or the same quantity of matter in a larger area).
• The entropy value measures the dispersion and quantifies it. The second law, as stated by Clausius, is that heat always moves from a high temperature to a low temperature.
• Boltzman added a probabilistic element to the second rule, explaining that if a temperature changes from high to low, it is not because of a universal law that commands it to happen that way, but rather because there is an enormously higher possibility that it will happen that way. Because energy loses value when equilibrium is attained in nature, the Carnot machine requires both a hot and a cold focus, which is another manifestation of Newton's second law.
• The usable energy is converted to useless energy from the particles in the environment where nothing can extract it due to the transfer of energy through heat travelling from heated to cold matter. The universe's entropy rises each time this occurs. The cosmos will have attained its maximum entropy and cease to exist when it reaches thermodynamic equilibrium. Of course, it will take a very, very long period.