Basic Concepts of Thermodynamics & Energy Transfer

Energy of motion is which type of energy?

• Potential
• Kinetic
• Sound
• Gravitational

Tags

NGSS.HS-PS3-2

The first law of thermodynamics is a restatement of the

• Zeroth law of thermodynamics

• law of heat addition

• principle of entropy

• conservation of energy

A system is in thermodynamic equilibrium

• if temperature and pressure at all points are same

• if temperature and pressure at all points are not same

• if temperature at all points are same

• if pressure at all points are same

When two bodies are in thermal equilibrium with a third body, they are also in thermal equilibrium with each other. This statement is called

• Zeroth law of thermodynamics

• First law of thermodynamics

• Second law of thermodynamics

• Kelvin Planck’s law

A closed system, with no change in KE and PE, is called

• Control Volume

• Stationary System

• Flow System

• Isolated system

For a stationary system

• $\Delta E\ =\ \Delta U$

• $\Delta E\ =\ \Delta PE$

• $\Delta E\ =\ \Delta KE$

• $\Delta E\ =\ \Delta PE+\Delta KE$

An energy interaction is __________, if its driving force is a temperature difference

• heat transfer

• work transfer

• restricted

• none of the above

Water is being heated in a closed pan on top of a range while being stirred by a paddle wheel. During the process, 45 kJ of heat is transferred to the water, and 8 kJ of heat is lost to the surrounding air. The paddle-wheel work amounts to 500 N.m. Determine the final energy of the system if its initial energy is 15 kJ.

A rigid tank contains a hot fluid that is cooled while being stirred by a paddle wheel. initially, the internal energy of the fluid is 500 kJ. During the cooling process, the fluid loses 300kJ of heat and the paddle wheel does 100 kJ of work on the fluid. Determine the final energy of the fluid.

What is the energy change of the system if the surrounding gains 250 J of heat energy and if 470 J of work is performed by the surrounding?