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Term Differences (Heat, Enthalpy, Temperature, and Work)

Posted: Sun Feb 10, 2019 9:12 pm
by Isabelle Fontanilla 1I
Can someone define heat, enthalpy, temperature, and work?

Re: Term Differences (Heat, Enthalpy, Temperature, and Work)

Posted: Sun Feb 10, 2019 9:27 pm
by Sara Lakamsani 4D
Heat is actually kind of difficult to define but I think the best way I've heard it described is the energy that is exchanged between a system and it's surroundings due to a difference in pressure. Temperature is just a scale we use to measure the intensity of heat which is why we often use degrees to measure it (different degrees of intensity). The change in enthalpy of a system show the exchange of energy between a system and its surrounding that is not due to mechanical work. The energy exchanged is usually heat, but heat only equals the change in enthalpy when temperature and pressure are constant. Work is force exerted over a distance. Hope this is helpful.

Re: Term Differences (Heat, Enthalpy, Temperature, and Work)

Posted: Sun Feb 10, 2019 9:29 pm
by Joon Chang 2F
Heat is the transfer of energy as a result of a temperature difference. Enthalpy is the amount of heat released or absorbed at constant pressure. Temperature is a measure of the average heat or thermal energy of the molecules in a substance. Work is the process of achieving motion against an opposing force.

Re: Term Differences (Heat, Enthalpy, Temperature, and Work)

Posted: Sat Mar 16, 2019 10:04 pm
by Sara Lakamsani 4D
Hope this helped you understand the concepts better!

Re: Term Differences (Heat, Enthalpy, Temperature, and Work)

Posted: Sun Mar 17, 2019 4:38 am
by Jacqueline Duong 1H
Heat is the transfer of energy due to a difference in temperature. Enthalpy is the heat absorbed or released from a system under constant pressure, where it is affected by factors such as the state of the reactants and products. Temperature is a measure of heat, where temperature can be used to indicate energy flow. Work is the energy required to move an object against a force.