A water molecule has its three atoms arranged in a "" shape, so it has rotational kinetic energy around any of three mutually perpendicular axes. However, like diatomic molecules, its vibrational modes are not active at temperatures below . What is the thermal energy of of steam at a temperature of ?
The thermal energy is .
The energy that a thing or area retains as a result of particle movement inside the object or system is known as thermal energy.
Thermal energy is one of several types of energy, with "energy" referring to the ability to do work. The movement of an element as a result of applied forces is referred to as work.
A system is more than just a collection of objects enclosed within a defined boundary. As a result, thermal energy is defined as an item's ability to perform work when particles are moving.
The water molecule has three translational degrees of freedom because its centre of mass can travel independently in any of the three directions. It has three rotational degrees of freedom because it includes spinning kinetic energy around any of three perpendicular axes.
. Under it has no vibrational degrees of freedom. Therefore, the water molecule has in total degrees of freedom. The number of degrees of freedom determines the molar specific heat at constant volume.
The following formula is used to determine thermal energy.
where is the number of moles. Substituting numerical values we obtain
Interstellar space, far from any stars, is filled with a very low density of hydrogen atoms ,not. The number density is aboutand the temperature is about .
a. Estimate the pressure in interstellar space. Give your answer in and in .
b. What is the rms speed of the atoms?
c. What is the edge lengthof ancube of gas withof thermal energy?
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