Heat and Work
Heat and work are fundamental concepts in thermodynamics, playing crucial roles in understanding the behavior of physical systems. Heat, defined as the transfer of energy between two bodies due to a temperature difference, drives numerous natural processes and technological advancements. Work, on the other hand, embodies the transfer of energy through mechanical means, often resulting in the displacement of objects or changes in their physical state. Together, these concepts form the backbone of thermodynamic principles, shaping our understanding of energy transfer and conversion in various systems and industries.
Questions
- If heat goes into a liquid, do I need to care about the work done on the liquid? Aren't they incompressible?
- One mole of an ideal gas does 3000 J of work on its surroundings as it expands isothermally to a final pressure of 1.00 atm and volume of 250 L. What is the initial volume and the temperature of the gas?
- How are energy heat and work related?
- In an adiobatic system, what's the relationship between heat and change in internal energy?
- A substance with a mass of 10 kg gains 106.5 kj of heat when its temperature increases 15°c. what is this substance's specific heat?
- How much energy is needed to heat 1 kg of sand, which has a specific heat of 664 j/(kg k) from 30°c to 50°c?
- If a process is taking place at constant temperature and pressure, delta E=0 but what about delta H?
- What is the change in internal energy (in J) of a system that absorbs 0.464 kJ of heat from its surroundings and has 0.630 kcal of work done on it?
- How is heat energy transferred?
- How would you calculate the work associated with the compression of a gas from 121.0 L to 80.0 L at a pressure of 13.1 atm?
- A steam engine receives 300 kJ of heat from its environment and does 400 kJ of work. How much does the energy of the steam engine change?
- A heating element of resistance r is fitted inside an adiabatic cylinder which carries a frictionless piston of mass m and crosssection A as shown in diagram. The cylinder contains one mole of an ideal diatomic gas. The current flows through the element ?
- How does heat affect resistance?
- A system receives 525 J of heat and delivers 525 J of work to its surroundings. What is the change in internal energy of the system?
- How is heat transferred in the troposphere?
- What is the work for the free expansion of a gas into vacuum?
- What are values of ΔH, ΔU, ΔS for 1 mole of H20?
- What is an example of heat in a thermodynamic practice problem?
- How does heat affect the movement of molecules?
- What is the work done when a sample of gas expands from 12.5L to 17.2L against a pressure of 1.29 atm? Give your answer in Joules.