Practice for Multiple choice 1. How much heat Q, in Joules, is required to warm up 1.0 kg of water from 10°C to 30°C? 2. An ideal gas is kept at constant pressure while increasing its volume from an initial volume of 5 liters to a final volume of 10 liters. The initial temperature of the gas is 450K, what is the final temperature? 3. Radio waves travel at the speed of light, 3.0 x 108 m/s. Find the wavelength of a radio wave received at 107 hertz. 4. Sound waves sent by a whale travel with a speed of 900 m/s in water. A whale emits sound wave directed toward the ocean floor below. If the sound wave takes 0.5 seconds to reach it, how far is the ocean floor from the whale?
Energy transfer
The flow of energy from one region to another region is referred to as energy transfer. Since energy is quantitative; it must be transferred to a body or a material to work or to heat the system.
Molar Specific Heat
Heat capacity is the amount of heat energy absorbed or released by a chemical substance per the change in temperature of that substance. The change in heat is also called enthalpy. The SI unit of heat capacity is Joules per Kelvin, which is (J K-1)
Thermal Properties of Matter
Thermal energy is described as one of the form of heat energy which flows from one body of higher temperature to the other with the lower temperature when these two bodies are placed in contact to each other. Heat is described as the form of energy which is transferred between the two systems or in between the systems and their surrounding by the virtue of difference in temperature. Calorimetry is that branch of science which helps in measuring the changes which are taking place in the heat energy of a given body.
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