Remake of Unit 4 Thermochemistry by Mari Lyons https://padlet.com/mari_lyons/s9bblje7zjki5hke en-us 2024-01-16 21:02:12 UTC 2024-01-16 21:24:58 UTC hello@padlet.com mari_lyons https://padlet.com/mari_lyons/s9bblje7zjki5hke/wish/2850989154 ENERGY is the capacity to do work and transfer heat


Kinetic Energy is the energy of motion


Potential Energy is the stored energy that arises from the attractions and repulsions an object experiences in relation to other objects.


Internal Energy is the sum of all kinetic and potential energies.

]]> 2024-01-16 21:04:28 UTC https://padlet.com/mari_lyons/s9bblje7zjki5hke/wish/2850989154 mari_lyons https://padlet.com/mari_lyons/s9bblje7zjki5hke/wish/2850990532 2024-01-16 21:05:50 UTC https://padlet.com/mari_lyons/s9bblje7zjki5hke/wish/2850990532 mari_lyons https://padlet.com/mari_lyons/s9bblje7zjki5hke/wish/2850991670 The unit for energy is joule (J)

]]> 2024-01-16 21:07:16 UTC https://padlet.com/mari_lyons/s9bblje7zjki5hke/wish/2850991670 mari_lyons https://padlet.com/mari_lyons/s9bblje7zjki5hke/wish/2850992766 system: the portion we single out for study

surroundings: everything else

]]> 2024-01-16 21:08:38 UTC https://padlet.com/mari_lyons/s9bblje7zjki5hke/wish/2850992766 mari_lyons https://padlet.com/mari_lyons/s9bblje7zjki5hke/wish/2850994120 Open System: matter and energy can be exchanged with the surroundings


Closed System: exchange of energy but no matter


Isolated System: neither energy or matter can be exchanged with the surroundings

]]> 2024-01-16 21:10:22 UTC https://padlet.com/mari_lyons/s9bblje7zjki5hke/wish/2850994120 mari_lyons https://padlet.com/mari_lyons/s9bblje7zjki5hke/wish/2850995034 2024-01-16 21:11:33 UTC https://padlet.com/mari_lyons/s9bblje7zjki5hke/wish/2850995034 mari_lyons https://padlet.com/mari_lyons/s9bblje7zjki5hke/wish/2850995178 2024-01-16 21:11:45 UTC https://padlet.com/mari_lyons/s9bblje7zjki5hke/wish/2850995178 Heat mari_lyons https://padlet.com/mari_lyons/s9bblje7zjki5hke/wish/2850996842

  • energy moves from a hotter object to a colder one

  • (q)

  • in joules or kilojoules

  • + = the system gains heat

  • - = the system loses heat

    • ]]>     2024-01-16 21:13:57 UTC https://padlet.com/mari_lyons/s9bblje7zjki5hke/wish/2850996842     Work mari_lyons https://padlet.com/mari_lyons/s9bblje7zjki5hke/wish/2850997618

  • (w)

  • w = -P(change in V)

  • in Lxatm

  • +=work done on system

  • - = work done by system

    • ]]>     2024-01-16 21:14:57 UTC https://padlet.com/mari_lyons/s9bblje7zjki5hke/wish/2850997618     mari_lyons https://padlet.com/mari_lyons/s9bblje7zjki5hke/wish/2850998089 2024-01-16 21:15:35 UTC https://padlet.com/mari_lyons/s9bblje7zjki5hke/wish/2850998089 mari_lyons https://padlet.com/mari_lyons/s9bblje7zjki5hke/wish/2851000042

  • involved: chemical equation, given mass/moles, and enthalpy

  • start with given amount and go from grams to moles to kj/mol to calculate heat produced per that amount.

    • ]]>     2024-01-16 21:18:04 UTC https://padlet.com/mari_lyons/s9bblje7zjki5hke/wish/2851000042     mari_lyons https://padlet.com/mari_lyons/s9bblje7zjki5hke/wish/2851001502

  • involved: heat capacity (c), a calorimeter, mass, and temp. change.

  • q = mc(change in temp)

  • change given values into correct units and plug into equation and solve for missing value

    • ]]>     2024-01-16 21:19:44 UTC https://padlet.com/mari_lyons/s9bblje7zjki5hke/wish/2851001502     Hess's Law mari_lyons https://padlet.com/mari_lyons/s9bblje7zjki5hke/wish/2851003558

  • involves: multiple equations with given enthalpy and one equation without given (goal equation)

  • change (flip) given equations to create the goal equation and add the enthalpy's together


    • ]]>     2024-01-16 21:22:08 UTC https://padlet.com/mari_lyons/s9bblje7zjki5hke/wish/2851003558     mari_lyons https://padlet.com/mari_lyons/s9bblje7zjki5hke/wish/2851005679

  • change in enthalpy = sum of enthalpys for products - sum of enthalpys for reactants

  • given a chemical equation

  • plug in enthalpy value from chart for each molecule multiplied by its coefficient into the formula.

    • ]]>     2024-01-16 21:24:58 UTC https://padlet.com/mari_lyons/s9bblje7zjki5hke/wish/2851005679