Closed Thermodynamic System Definition
A closed thermodynamic system is defined as a system where mass cannot transfer across its boundaries, but energy can.
Energy Transfer in a Closed System
Energy can be transferred across the system boundary in two primary forms:
- Heat: Energy transfer due to a temperature difference.
- Work: Energy transfer due to a force acting over a distance.
Since a closed system allows for energy transfer but not mass transfer, both heat and work can cross its boundaries.
Conclusion
Therefore, in a closed thermodynamic system, the transfer of heat and work is possible across its boundaries.
Important Questions from Thermodynamics
- Second law of thermodynamics states that
A. Energy flows from higher concentration to lower concentration.
B. Order becomes disorder during energy transformations.
C. The quality of energy degrades as it is transformed.
D. Degraded energy is entropy, dessipated as waste products or heat.
E. Enthalpy is wasted in energy transformation.
Choose the most appropriate answer from the options given below: Choose the Incorrect Statement:
1 For a system at equilibrium, chemical potential is same in all phases.
2 Gibb's free energy change is zero at equilibrium state of a system.
3 Gibb's free energy change is positive for reaction to occur spontaneously.
4 $\Delta G$ will become more negative with increasing temperature.Melting Point of pure ice is-
Which one among the following statements with reference to the properties of water is not correct?
For a certain reaction, ΔG θ = -45 kJ/mol and ΔH θ = -90 kJ/mol at 0 °C. What is the minimum temperature at which the reaction will become spontaneous, assuming that ΔH θ and ΔS θ are independent of temperature?
