How much energy can 1molatp store

Why is heat capacity different for monatomic and polyatomic molecules?

Similarly, explain why the dependence of heat capacity on the temperature is different for monatomic and polyatomic molecules. All molecules at temperatures above absolue zero possess thermal energy — the randomized kinetic energy associated with the various motions the molecules as a whole, and also the atoms within them, can undergo.

What is molar heat capacity?

Table 14.3.1 14.3. 1: Molar heat capacities (kJ mol –1 K –1) of some gaseous substances at constant pressure. Whereas monatomic molecules can only possess translational thermal energy, two additional kinds of motions become possible in polyatomic molecules.

Where is energy stored?

Energy is stored. For example, energy is stored in the kinetic energy store in objects that move. When we pay for an item in a shop we are transferring our money from one store (pocket, purse or wallet) to another (the till). Energy can be transferred between different stores. In the United Kingdom, money is measured in pounds sterling (£).

Why are polyatomic molecules a vehicle for storing and transporting energy?

Polyatomic molecules also possess potential energy in the form of chemical bonds. Molecules are thus both vehicles for storing and transporting energy, and the means of converting it from one form to another when the formation, breaking, or rearrangement of the chemical bonds within them is accompanied by the uptake or release of heat.

Why does a polyatomic gas have a larger heat capacity?

In a polyatomic gas, by contrast, the absorbed energy is partitioned among the other kinds of motions; since only the translational motions contribute to the temperature, the temperature rise is smaller, and thus the heat capacity is larger.

Which object has more energy in its thermal energy store?

An object has more energy in its thermal energy store when it is hot than when it is cold. The amount of energy in the thermal energy store depends on the temperature of the object. Batteries, foods and fuels store energy in their chemical energy stores. The candle wax in the picture is a type of fuel.