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Specific Heat Capacity

Specific Heat Capacity. Chu Wei Xiang (3S311) Kenneth Tan (3S209) Tan Yu Yang (3S323). Specific Heat Capacity. The amount of heat energy required to raise the temperature of a unit mass (of the body) by one degree, without going through a change in state. Specific Heat Capacity.

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Specific Heat Capacity

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  1. Specific Heat Capacity Chu Wei Xiang (3S311) Kenneth Tan (3S209) Tan Yu Yang (3S323)

  2. Specific Heat Capacity • The amount of heat energy required to raise the temperature of a unit mass (of the body) by one degree, without going through a change in state

  3. Specific Heat Capacity Heat or thermal energy absorbed or released (in J) Q c = m × ∆T Change in temperature (final temperature – initial temperature) [in K or °C] Specific heat capacity (in Jkg-1K-1 or Jkg-1 °C -1 ) Mass of the substance (in kg)

  4. Specific heat capacity • Larger amount of heat energy is required to raise the temperature of a substance with high specific heat capacity than one with low specific heat capacity. • The specific heat of almost any substance can be measured, these includes chemical elements, compounds, alloys, solutions etc.

  5. Factor affecting specific heat capacity • Impurities: • For alloys, small impurity concentrations can greatly affect the specific heat. • Alloys may display difference in behavior even when small amounts of impurities are present on one element of the alloy.

  6. Specific heat capacity and heat capacity • Temperature of an object is a measure of its random molecular motions. • Temperature increases as the average speed of the atoms or molecules increases. • Different materials have different specific heat capacity because different types of molecules and atoms need different amounts of energy to raise their speed.

  7. Specific heat capacity and heat capacity • For the similar material, a larger object will have a larger heat capacity • More molecules that must move faster to increase the temperature. • Therefore they need more thermal energy to raise the temperature.

  8. List of specific heat capacities

  9. Specific Heat Capacity and Heat exchanger If the fluid passing through the pipes is to be warmed: • Fluid to be warmed: low SHC • Fluid used to warm: low SHC • Pipes (fluid to be warmed passes through): low SHC

  10. References: • http://www.lifetime-reliability.com/Training/TGT001%20Heat%20exchanger%20basics.pdf • http://hyperphysics.phy-astr.gsu.edu/HBASE/thermo/spht.html#c2 • http://www.economicexpert.com/a/Joule:per:kilogram:kelvin.htm • http://dic.academic.ru/dic.nsf/enwiki/17444 • http://physics.suite101.com/article.cfm/specific_heat_capacity • http://www.absoluteastronomy.com/topics/Specific_heat_capacity • http://books.google.com.sg/books?id=SE-s6b6W3N4C&pg=PA195&lpg=PA195&dq=specific+heat+capacity+in+heat+exchanger&source=bl&ots=R5lnhqoqbh&sig=SW568rWgY3pLDaEpRY-VsDInh2Y&hl=en&ei=Q7oCSvfoNsyGkQXoorzOBA&sa=X&oi=book_result&ct=result&resnum=7

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