SECOND LAW OF THERMODYNAMICS

“nothing in life is certain except death, taxes, and the second law of thermodynamics” – Seth Lloyd

the Second Law of Thermodynamics s a general principle which places constraints upon the direction of heat transfer and the attainable efficiency of heat engines. in first law of thermodynamics wherein, energy is never created or destroyed, that means that energy can just be recycled over and over again.

well…. energy cannot be created or destroyed, but it can change from more-useful forms into less-useful forms. As it turns out, in every real-world energy transfer or transformation, some amount of energy is converted.

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• every energy transfer that takes place will increase the entropy of the universe and reduce the amount of usable energy available to do work.
• any process, such as a chemical reaction or set of connected reactions, will proceed in a direction that increases the overall entropy of the universe.
• in all energy exchanges, if no energy enters or leaves the system, the potential energy of the state will always be less than that of the initial state, also commonly referred as a entropy.

ENTROPY – a degree of randomness or disorder in a system

wherein, the First Law of Thermodynamics tells us about conservation of energy among processes, while the Second Law of Thermodynamics talks about the directional of the processes, that is, from lower to higher entropy.

In learning this second law of thermodynamics  my experienced in learning this topic at first it is really hard but at the end of the day i can say that if its really hard to understand don’t rush yourself because in learning a certain thing you can learn by step by step. uhmmm our teacher gave us an activity wherein you’ll find a partner to answer the worksheet so again me and my partner debate because we don’t have the same answer on solving the question so we need some explanation from the other groups. we share our knowledge to each other but our teacher sir lex gave us more knowledge about the topic.

In our daily life not in all times you can stand by your own but you need somebody so that he/she can correct the wrong that you have done. A person who will guide you at the end of the day that teach you and to understand the things that you don’t know.

In learning the second law of thermodynamics: heat engines, it is impossible to extract an amount of heat Q_H from a hot reservoir and use it all to do work W . Some amount of heat Q_C must be exhausted to a cold reservoir.

This is sometimes called the “first form” of the second law, and is referred to as the Kelvin-Planck statement of the second law.

KELVIN-PLANCK t is impossible to devise a cyclically operating device, the sole effect of which is to absorb energy in the form of heat from a single thermal reservoir and to deliver an equivalent amount of work. This implies that it is impossible to build a heat engine that has 100% thermal efficiency.