Some of the Things you do that is Related with Laws of Thermodynamics

Thermodynamics is the branch of physics that deals with the relationships between heat and other forms of energy. In particular, it describes how thermal energy is converted to and from other forms of energy and how it affects matter.





So What do you think are the things you do That is Related to Thermodynamics?

Here are some examples:

1.Taking a Bath

 Consider a situation where a person takes a very long bath. Immediately during and after filling up the bathtub, the water is very hot -- as high as 120 degrees Fahrenheit. The person will then turn off the water and submerge his body into it. Initially, the water feels comfortably warm, because the water's temperature is higher than the person's body temperature. After some time, however, some heat from the water will have transferred to the individual, and the two temperatures will meet. After a bit more time has passed, because this is not a closed system, the bath water will cool as heat is lost to the atmosphere. The person will cool as well, but not as much, since his internal homeostatic mechanisms help keep his temperature adequately elevated.

2. Sweating in a Crowded Room
 The human body obeys the laws of thermodynamics. Consider the experience of being in a small crowded room with lots of other people. In all likelihood, you'll start to feel very warm and will start sweating. This is the process your body uses to cool itself off. Heat from your body is transferred to the sweat. As the sweat absorbs more and more heat, it evaporates from your body, becoming more disordered and transferring heat to the air, which heats up the air temperature of the room. Many sweating people in a crowded room, "closed system," will quickly heat things up. This is both the first and second laws of thermodynamics in action: No heat is lost; it is merely transferred, and approaches equilibrium with maximum entropy.

3. Melting Ice Cube

 Every day, ice needs to be maintained at a temperature below the freezing point of water to remain solid. On hot summer days, however, people often take out a tray of ice to cool beverages. In the process, they witness the first and second laws of thermodynamics. For example, someone might put an ice cube into a glass of warm lemonade and then forget to drink the beverage. An hour or two later, they will notice that the ice has melted but the temperature of the lemonade has cooled. This is because the total amount of heat in the system has remained the same, but has just gravitated towards equilibrium, where both the former ice cube (now water) and the lemonade are the same temperature. This is, of course, not a completely closed system. The lemonade will eventually become warm again, as heat from the environment is transferred to the glass and its contents.


4. Hot Frying Pan
The iron atoms in a hot frying pan (system) in a room (surroundings) are vibrating very rapidly, like fast ‘dancing in place’. Therefore, considering both the pan and the room, the motional energy in the hot pan is localized. Its motional energy will disperse — if it can and is not hindered from spreading out, according to the second law. Whenever the less rapidly moving molecules in the cooler air of the room hit the hot pan, the fast-vibrating iron atoms transfer some of their energy to the air molecules. The pan’s localized energy thus becomes dispersed, spread out more widely to molecules in the room air.

5. Air in tire
Air in a tire is at a higher pressure than the atmosphere around it and so it shoots out even from a small hole. What could that have to do with a big deal like the second law of thermodynamics? (Every spontaneous physical or chemical process involves the second law!) Those nitrogen and oxygen molecules in the tire each have motional energy but it is far more 'localized', compressed in the small volume of the tire, than it would be in the huge volume of the atmosphere. Thus, the second law explains why punctures or blowouts occur: the motional energy of those localized/forced together molecules will become dispersed and spread out to the lower pressure, larger volume atmosphere if it is no longer hindered by the tire walls from becoming so.

6. Rocks that falls down on mountains
 A rock has potential energy (PE) localized in it when you lift it up above the ground. The rock is the 'system'; everything else it encounters is the 'surroundings'. Drop the rock and its PE changes to kinetic energy (energy of movement. KE), pushing air aside as it falls (therefore spreading out the rock’s KE a bit) before it hits the ground, dispersing a tiny bit of sound energy (compressed air) and causing a little heating (molecular motional energy) of the ground it hits and in the rock itself. The rock is unchanged (after a minute when it disperses to the air the small amount of heat it got from hitting the ground). But the potential energy that your muscles localized in by lifting it up is now totally spread out and dispersed all over in a little air movement and a little heating of the air and ground.

           So, It means to say that in every actions we do it is related to Science. We can say therefore that Science is everywhere and it is interesting subject.


Flashback on BS 109 (biochemistry)

      Ang subject na ito ay nakatutuwa, nakakabaliw, nakakaiyak, nakakaamaze at higit sa lahat madami kang matutunan na bagay na akala mo dati ay walang importansya. Paano ko nga ba nasurvive ang biochemistry?

          Mag umpisa tayo sa unang pasok ko sa subject na ito. Syempre puro flashback muna , mga founders, mga scientist tulad nila Eduard Buchner, mga di ma ubos ubos na concept. Siguro kung tatanungin niyo ko kung gaano kadaming concept, masasabi kong MAY FOREVER. Pero okay lang yun dahil sa kwela at napakagaling na guro ko sa Biochemistry na si Sir Emmerson Ramir Espana,  na itawid naman namin ang bawat concepts na ito dahil madalas inirerelate niya ito sa daily life.

         Pag usapan naman natin ang Exam and quizzes. Grabi...... Yan ang masasabi ko. Actually madali namang magbigay ng quiz si sir yun nga lang siguro tamad lang kaming mag advance reading at intindihin mabuti ang mga tinuturo niya (wala kasi akong inpirasyon:P)

         Pagtuturo ng teacher namin? Simple lang pero Magaling. Yan lang ang masasabi ko. Nakakaamaze malaman na ang galing nila sa Biochem. at iba pang larangan ng subject ng Chemistry.

        Masaya ako na kahit minsan mabababa ang nakukuha ko, atleast nasasabi ko sa sarili ko na atleast I've learned. As future teacher, Lahat ng tinuro nila ay ibabahagi ko din sa mga estudyante ko.Di lang ako magfofocus sa concept I will add some humor(tukad ng ginagawa ng guro ko) para di maboring ang klase at makuha ko ang atensyon ng aking mga estudyante.Biochemistry is a fun and interesting subject. I hope you will enjoy your Biochemistry Subject.