Chemical energy (fuel and oxygen) – chemical energy (combustion products) – thermal energy released According to the principle of energy saving (also known as the first law of thermodynamics), energy cannot be produced or destroyed; instead, it can be converted from one mould to another (Raven-Johnson, 1999; Solomon et al., 1993). All forms of energy are interconversible from one form to another without “loss.” Any apparent loss of energy can be explained as a transformation of energy into another form. In biological/living systems, for example, some of the energy is used to stimulate metabolic processes, some of which is released into the atmosphere as heat. This is why energy, as a quantity retained at the system level, relies on many support concepts such as energy source, energy transfer, energy flow and conversion (Mclldowie, 1995). The δ before the concept of heat and work are used to indicate that they describe an increase in energy that must be interpreted somewhat differently from the U-shaped display increment of the inner energy (see imprecise differentiation). Work and heat refer to types of processes that add or subtract energy from a system or system, while U-Displaystyle U internal power is a property of a certain state of the system when it is in an invariable thermodynamic balance. Thus, for δ Q display style, the term “thermal energy” means “this amount of energy added as a result of heating,” rather than referring to a particular form of energy. Similarly, the term “working energy” for δ W display mode means “Delta W” “that amount of energy lost because of work.” Thus, one can say the amount of internal energy that is possessed by a thermodynamic system that is known to be currently in a given state, but one cannot only say by knowledge of the current state, how much energy in the past has poured into the system because it has been heated or cooled, nor as a result of the work done on or through the system. Chemical reactions such as combustion can also be a source of light energy.
Testimony During training, energy is built into the body, also tested if students accept that energy is “built.” And 16% of them wrongly said it was the right thing to do, and six of them were sure of their answer. On the contrary, almost all students (82%) scientists` opinion that the testimony was false, and more than half of these students (47 of them) were sure of their response. When asked if they wanted to emphasize the wrong word or phrase in the statement, 42 students recognized and pointed out “Build up” as a wrong expression. However, only 7 students wrote in an acceptable phrase “converted into different forms” to correct the testimony. The rest of the students still provided unacceptable phrases as exhausted (23 students) and lost (7 students). As explained above, the word lost goes against the principle of energy saving if there is no additional explanation for the loss of thermal energy to the body during breathing. The percentage of the agreement was between 87% and 96% for a corresponding Kappa coefficient of 0.85 to 0.90. The agreement as a percentage of more than 75% and Kappa`s values above 0.5 are considered to be an indication of a good level of the Interrater agreement (Chiapetta, Fillman-Sethna, 1991).