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@Vincent-Lyon.Fr @Abhisar @Australopithecus @EWack @rsadhvika
If a system is isolated, then nothing can enter or leave. A bomb calorimeter only allows heat to be exchanged. Such a system is called closed. An example of a closed system is a balloon being heated so the gas inside expands it, or a piston like in the movie : no matter is exchange, only heat. When both matter and energy can be exchanged, the system is called open. I hope this helps :)
Yes! that does help alot!! Really good explanation! Thank you!
No problem. :)
Isolated System = Niether mass nor energy can escape or enter. Closed system = Mass can't escape or enter but energy exchange can take place. Open System = Both energy and mass can b exchanged between system and environment.
@danicap are you really good at chem??
Depends on what you're working on. If it's moles and percents then no :P But other than that, yeah :)
Do you wanna help me with some response question?? Its the study guide for the final and its like 100 pages long but i need help on the last three sections!
Sure, I can do my best :)
Thanks!! 1. Describe what happens to energy over the course of a reaction. 2. Distinguish between endothermic and exothermic processes in terms of observed temperature changes and energy flow. 3. Be able to create and interpret potential energy diagrams for endothermic and exothermic processes.
is this the question @danicap
@SkaterBoyShawn no, I messaged you
sorry am i helping @georgia545
oh sorry ok
so can i message u the answer
@georgia545 1. This diagram shows that, overall, the reaction is exothermic. The products have a lower energy than the reactants, and so energy is released when the reaction happens.
2. • All chemical reactions involve the transfer of energy. • Endothermic processes require an input of energy to proceed and are signified by a positive change in enthalpy. • Exothermic processes release energy upon completion, and are signified by a negative change in enthalpy Source: Boundless. “Exothermic and Endothermic Processes.” Boundless Chemistry. Boundless, 01 Jun. 2015. Retrieved 04 Jun. 2015 from https://www.boundless.com/chemistry/textbooks/boundless-chemistry-textbook/thermochemistry-6/enthalpy-59/exothermic-and-endothermic-processes-277-3716/
if a system is open, then anything can enter. if closed then nothing can enter. if its isolated then neither of the above can happen because it cancels them out.