Specific Heat: Overview, Questions, Preparation

Thermodynamics

Updated on Sep 1, 2021 04:40 IST

Specific heat is being used to find something particular to the thermal property of a substance. To alter or increase the temperature of heat of a substance by 1 or more degrees – specific heat comes into the picture. To find the particular mass of an element or heat of the substance, we use the 'specific' word. The heat capacity of every substance differs from each other, and the heat capacity of a substance is highly dependent on the pressure, temperature, and volume of the substance.

The equation generates from the specific heat capacity is as follows:

Q= mcΔT Q = mc Δ T

The above equation articulates the relationship between the mass and temperature of a substance. The heat transfer is proportional to the increase in the temperature, and the equation is as follows:

Q = coeff x ∆T

Applications of specific heat

The principle of specific heat is applicable in a variety of places. Some of the major applications of specific heat are listed below:

  1. The specific heat is used to identify and measure the molecular structure of gases, liquids, and solids. It includes heterogeneous materials such as granite, concrete, milk, etc. It also consists of alloys and other mixtures.
  2. The specific heat is also applicable to the substances that change the concentration of the substance or size of the element by adding or subtracting the components of the substance. As long as the concentration of the elements can be reversed or can be edited, a specific heat principle is used.
  3. It usually is used for the gases and liquids that disassociate the concentration when the temperature is changed.
  4. Specific heat technique is not used when the concentrations or the properties of the substances cannot be reversed or altered.
  5. In the case of boiling and melting of substances, a specific heat technique depends on the mass and temperature of the element.

Physical properties of Specific heat

The physical properties of specific heat can be classified using two gases. For better understanding, let's study those gases in more detail.

  1. Monoatomic gases – In the form of kinetic energy, an isolated ion cannot store energy in it. It is approved by Quantum mechanics.
  2. Polyatomic gases except kinetic energy, polyatomic gases can store all sorts of specific heat capacity.

Specific heat for Class 11

The chapter on thermodynamics covers the concept of Specific Heat Capacity as a topic. The chapter per the latest CBSE mark pattern covers a total of 8 marks.

Illustrated Examples

Example 1) – Provide an equation exemplar representing the relation between heat transfer and increase in temperature of the substance.

Answer – The heat transferred is indirectly proportional to the increase in the temperature, and the equation is as follows:

Q = coeff x ∆T

Example 2) – Specify an equation exemplar for Specific Heat.

Answer - The equation for the specific heat capacity is as follows: Q=mcΔT Q = mc Δ T

Example 3) – What does the behaviour of specific heat depend on during boiling points?

Answer - In the case of boiling and melting of substances, a specific heat technique depends on the mass and temperature of the element.

FAQs on Specific Heat

Q. Write about the classification of physical properties of specific heat.

A. The physical properties of specific heat can be classified using two gases – Monatomic and Polyatomic gases.

Q. Explain Monoatomic gases.

A. Monatomic gases in the form of kinetic energy, act as an isolated ion that cannot store energy.

Q. Explain Polyatomic gases.

A. Except kinetic energy, polyatomic gases have the potential to store all sorts of specific heat capacity.

Q. Explain one application of specific heat.

A. It is usually used for the gases and liquids that disassociate the concentration when the temperature is changed.

Q. What’s the SI unit of specific heat?

A. Joule per Kelvin.
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