0000000000225816
AUTHOR
I. A. Stepanov
showing 5 related works from this author
Thermodynamics of Substances with Negative Thermal Expansion Coefficient
2000
The 1st law of thermodynamics for heat exchange is dQ=dU+PdV. According to K. Martinas etc., J. Non-Equil. Thermod. 23 (4), 351-375 (1988), for substances with negative thermal expansion coefficient, P in this law is negative. In the present paper it has been shown that P for such substances is positive but the sign before P must be minus not plus: dQ=dU-PdV.
The Heats of Reactions. Calorimetry and Van't-Hoff. 3
2001
Earlier, the author found that for the biggest part of chemical reactions the law of conservation of energy must have the following form: dU=dQ+PdV+SUM. In the present paper this result is confirmed by other experiments.
The 1st Law of Thermodynamics in Chemical Reactions
2000
In the previous papers of the author it has been shown that the 1st law of thermodynamics in chemical reactions is the following one: dU=dQ+PdV+SUM In the present paper this theory was developed and it has been shown that the 1st law of thermodynamics in chemical reactions has the following form: dC=-dU+dA and -dU=dQ where dC is the change in the chemical energy, dU is the change in the internal energy. Internal energy is the energy of thermal motion of molecules.
The Heats of Reactions. Calorimetry and Van't-Hoff. 2
2000
Earlier, the author found that for the biggest part of chemical reactions the law of conservation of energy must have the following form: dU=dQ+PdV+SUM In the present paper this result is confirmed by other experiments.
The Heats of Reactions. Calorimetry and Van't-Hoff. 1
2000
It has been supposed that the law of conservation of energy in chemical reactions has the following form: dU=dQ-PdV+SUM Earlier the author has shown that for the biggest part of reactions it must have the following form: dU=dQ+PdV+SUM In the present paper this result is confirmed by other experiments.