Why do gases have two specific heats unlike liquids and solids?

Explanation: the specific heat is the amount of energy needed to raise the temperature of one mole of gas by 1 kelvin. the reason gasses have two specific heats because they are not stable, they change more than liquids and solids. …

Why do gases have two specific heats?

A solid or a liquid when heated does not undergo any change in the volume or pressure. But in case of a gas, both the pressure and volume change on heating. Therefore, specific heat of a gas is defined either at constant volume or at constant pressure and hence a gas has two specific heats.

Why do gases have two specific heats unlike liquids and solids define each of these quantities and obtain a formula for determining their values?

We have two principal spacific heats of a gas, one at constant pressure and another at constant volume. That is why there is only one value of specific heat fo solid or liquid which is at constatn volume and pressure. so energy is required for the expansion of gas. we have two principle specific heats of a gas.

Why is specific heat different for different substances?

Each substance will have a different mass, so when the amount of heat and the change in temperature are held constant, the only variable is the mass. Therefore, because mass is the only variable, so because substances have different masses, they will have different specific heats.

Why do liquids and solids only have specific heat?

Explanation: Specific heat of a substance is defined as the amount of heat required to raise the temperature of a unit mass of any substance through one degree. Since solids and liquids are considered as incompressible, therefore they have only one specific heat.

Why does a gas have two principal specific heat capacities which one is greater and why?

Two principal specific heats of a gas are 1 Molar specific heat capacity at constant pressure 2 molar specific heat capacity at constant volume. Hence the amount of heat required to be supplied to a gas to raise its temperature by 1°C say at constant pressure will be greater than the amount required at constant volume.

What is meant by specific heat of gas give its types?

specific heat, the quantity of heat required to raise the temperature of one gram of a substance by one Celsius degree. The units of specific heat are usually calories or joules per gram per Celsius degree.

Why are there two specific heats for gases CP and CV yet only one given for solids?

It’s value may vary depending on the process you are providing this energy. Hence we have two values of C namely Cv and Cp . But since liquids and solids can practically assumed to be incompressible, Cp and Cv for them have almost same values and hence only a single value of specific heat is used for them.

Can two different materials have the same value of specific heat capacity?

It should be noted that two substances can have the same specific heat capacity just as two substances can have the same density, but for example, if the heat capacity of a clear liquid is not 1 cal/goC, the substance can not be pure water.

What is the specific heat of other substances?

Specific heat is defined by the amount of heat needed to raise the temperature of 1 gram of a substance 1 degree Celsius (°C). Water has a high specific heat, meaning it takes more energy to increase the temperature of water compared to other substances.

Why does a gas not possesses a unique or single specific heat?

This is because a gas can be heated under different conditions of pressure and volume. The amount of heat required to raise the temperature of unit mass through unit degree is different under different conditions of heating.

What is meant by specific heat of a gas give its types?`?

Why do solids have different specific heat values for gases?

But solids do not have a huge variation since their interatomic distance remains the same at both constant volume and constant pressure, and so do liquids at certain temperature and pressure. That’s why we use dual specific heat values for gases only.

How do we measure specific heat of gases?

For gases, the measurement can be affected by many state variables of the system such as temperature, pressure and volume of the system before and after the heat is added. Therefore, we use two methods to measure the specific heat of gases, which are at constant volume and constant pressure.

Why is specific heat at constant pressure greater than at constant volume?

Therefore, heat supplied at constant pressure is more than heat supplied at constant volume by an amount of heat which is used for doing external work. This explains why specific heat of a gas at constant pressure is greater than the specific heat at constant volume. i.e. C P > C V. Further by Mayer’s relation C P – C V = R.

What is the relation between molar specific heat and principal specific heat?

Relation Between Molar Specific Heats and Principal Specific Heats: Molar specific heat at constant volume is Molecular mass times the principal specific heat at constant volume. Molar specific heat at constant pressure is Molecular mass times the principal specific heat at constant pressure.