Presentation on heat and temperature
- 1. Presentation on Heat and Temperature Our Members:
- 2. Overview 01: History. 02: What is Temperature & Heat ? 03: Source of Heat & Temperature. 04: Type of Scale. 05: Celsius Scale. 06: Fahrenheit scale. 07: Kalvin Scale. 08: Absolute Zero & temperature scale comparisons. 09: Type of Heat Transfer. 10: Conduction 11: Convection 12: Radiation. 13: Relation between heat &temp 14: Difference between temperature and heat. 15. causes of heat. 16. causes of temperature. 17. Results of Heat & Temperature.
- 3. 01: History Until the end of the 18th century, scientists thought that the ultimate liquid called caloric. In 1798, an American scientist named Benzamine Thompson Rumford (1753-1814) Proved that there is nothing in the reality of the calorie. It was about 40 years latter that an English physicist James Prescott(24 December 1818 -11 October 1889) heat must be just another from energy.
- 4. 02: What is Heat & Temperature? Heat: Heat is a form of energy which flows from higher temperature to lower temperature by conduction , convection and radiation processes. Example: The biggest example of heat energy in our solar system the sun itself.The sun radiates heat to warm up on the planet erath. Temperature: Temperature is the thermal state of a body which controls the flow of heat from one body to another & determines the direction on heat flow.
- 5. 03: Source of Heat & Temperature. Natural Source The Sun: When the sun’s energy reaches the earth, 30% of it’s is immediately reflected back out into space only 70% remains to interact with the earth and warm it up . Artificial Source Chemical Action: When fuels like coal ,Kerosene , wood & gasoline are burned they are used as artificial sources of heat
- 6. 04: Type of Scale 1: Celsius Scale. 2: Fahrenheit scale. 3: Kalvin Scale.
- 7. 05: Celsius Scale Celsius Scale: Commonly Known as Centigrade Scale. This scale was devised in 1741 by a Swedish astronomer, Andres Celsius, based on the properties of water.
- 8. 06: Fahrenheit Scale Fahrenheit Scale: The Fahrenheit scale was devised by Daniel Gabriel Fahrenheit, A German physicist. Units sates of America and England use the Fahrenheit scale for weather observation & other purposes.
- 9. 07: Kalvin scale Kalvin Scale: Named after sir Willam Thomsom(Loard Kalvin) who deserve it.26 June 1824 – 17 December 1907)
- 10. 08:Absoutle Zero & Temperature scale comparisons. Defined as 0 kelvin. Average temperature of space is 2.7k. Scientists have gotten within fraction of absolute zero ,but it is impossible to ever completely stop the movement of an atom , since that means it has zero energy.
- 11. 09: Type of Heat Transfer 1. Conduction. 2. Convection. 3. Radiation.
- 12. 10: Conduction This process accurse in most solids . Heat is transferred by direct contact. Solid are the best conductors of heat. Transmission of heat from particle to particle.
- 13. This process occurs in liquid and gusses Heat is transferred by the movement of currents Is the tranfort of heat with in a substance by the actual movement the substance itself 11: Convection
- 14. Transfer of heat through electromagnetic waves The heated substance is not necessary 12: Radiation
- 15. We can calculate the heat released or absorbed using the specific heat capacity /text ccc,the mass of the substance /text mmm ,and the change in temperature /delta /text TϫT delta ,T in the following equation. 13: Relation between Heat and Temperature
- 16. 14: Difference between heat and temperature
- 17. Sun Petroleum Natural gas Coal Solar energy 15: Causes of heat
- 18. Sun Petroleum Natural gas Coal Solar energy 16: Causes of Temperature
- 19. 17: Results of Heat & Temperature. Heat, q, is thermal energy transferred from a hotter system to a cooler system that are in contact. Temperature is a measure of the average kinetic energy of the atoms or molecules in the system. We can calculate the heat released or absorbed using the specific heat capacity C, the mass of the substance m, and the change in temperature ΔTdelta, T in the equation: q=m×C×ΔT