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The SI unit of heat energy transferred is expressed in joule (J) while SI unit of temperature is kelvin (K), and °C is a commonly used unit of temperature. When an object is heated, many changes may take place. Its temperature may rise, it may expand or change state. We will study the effect of heat on different bodies in later sections.
This document discusses key concepts in chemical thermodynamics including: 1. It defines thermodynamics as the study of energy changes during physical and chemical transformations between different states of matter. 2.
pressure and temperature do not change with time for a system in equilibrium state. In this unit, we would like to answer some of the important questions through thermodynamics, like: How do we determine the energy changes involved in a chemical reaction/process? Will it occur or not? What drives a chemical reaction/process?
In this chapter we shall study laws that govern thermal energy. We shall study the processes where work is converted into heat and vice versa. In winter, when we rub our palms together, we feel warmer; here work done in rubbing produces the ‘heat’.
Thermal physics. Unit of Heat. Heat energy flows from one body to another body due to their temperature difference. It is measured in units of calorie. A calorie is the amount of heat required to raise the temperature of 1 gm of water through 1°C. 1 KiloCalorie = 103 Calories. 1 Calorie = 4.186 Joule
Temperature Change and Specific Heat The amount of energy that raises the temperature of 1 kg of a substance by 1 K is called the specific heat of that substance. The symbol for specific heat is c. If W = 0, so no work is done by or on the system, then the heat needed to bring about a temperature change ∆T is
Physics Formulas for Class 11 and Class 12 Author: Jitender Singh Subject: Physics formulas from Mechanics, Waves and Oscillations, Optics, Heat and Thermodynamics, Electricity and Magnetism and Modern Physics. Also includes the value of Physical Constants. Helps in quick revision for CBSE, NEET, JEE Mains, and JEE Advanced.
