Question

For the following reaction: -
$C{H_2}O(g) + {O_2}(g) \to C{O_2}(g) + {H_2}O(g)\,,\,\Delta H = - 527KJ$
Calculate the amount of heat evolved in the formation of $0.04$ kg of $C{O_2}$ .

Answer 1

The branch of chemistry which deals with the study of heat, heat flow is coined as thermodynamics. This thermodynamics governs several processes like Isothermal, Adiabatic, Isobaric, Isochoric, Cyclic, Reversible and Irreversible processes. Furthermore, due to thermodynamics today we know about the expansion theory of the solar system.

Complete answer: Heat is the energy that is being exchanged between two bodies, these bodies may be both systems, or one may be a system and other be a surroundings. Internal energy is the sum total of all energies accommodated by a system. The exchange or the changes taking place in heat at constant pressure and constant pressure is called enthalpy denoted as $\Delta H$ .
Thermodynamics has 4 rules or laws named as zeroth law, first law, second law and the third law.
The first law was the first law to be discovered and this law governs the conditions and the explanation of the internal energy, enthalpy, work, heat, endothermic reaction, exothermic reaction, heat capacity and many more.
The second law was the second in series of the laws of thermodynamics to be discovered. This law deals with the entropy, and the thermochemistry equations.
The third law was the third series of the laws of thermodynamics to be discovered.
The zeroth law was the fourth series of the laws of thermodynamics to be discovered.
The solution for the equation is as follows: -
Moles of carbon dioxide is $0.04$ kg which means $4$ g
Molecular weight of carbon dioxide is
Molecules of carbon dioxide = $\dfrac{{40}}{{44}} \Rightarrow 0.90$
Heat evolved for $1$ mole is $- 527KJ$ then for $0.90$ is
$0.90 \times - 527 = 474.3$

Note:
Thermodynamics is the branch of chemistry which is not restricted to earth and atoms only. Due to thermodynamics, today we know about the expansion theory and expansion properties of the universe (increase in entropy leads to stability). It is due to this thermodynamics, that the chemists were able to determine the temperature correction in several theories.