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Chemistry - Coggle Diagram

- - - - Heat (q): energy in transit due to a temp difference
        
        Heat capacity (C): q/△T
        
        Specific Heat Capacity (Cs): q/m△T whos units are JK-1g-1
        
        Molar Heat Capacity (Cm): q/n△T whos units are JK-1mol-1
        
        When heat capactity is measured at a constant of one particular variable, it written in subscript. Cp,Cm,Cpm,Cvm
      - Temperature (T): intensive prop. used to define the state of a system and determines the direction of heat flow
      - Types of containers
        
        Diathermic: allows for heat transfer
        
        Adiabatic: not allowing transfer of heat
    - - Classically W=mgh, where m is mass, g is gravity (9.81) and h is height
      - Expansion Work:
        
        When combined with the ideal gas law: PV=nRT
        
        W=-RT△n
        
        Maximum work: attained when the difference in internal and external pressure is changed in infinitesimally small steps
        
        When pressure outside the system is juuuust the smalles amount smaller than the pressure inside
        
        Remember the idea of Mechanical equilibrium
        
        So think about Maximum work being a reversible change that happens in veeery small steps. So we can use integration for finding the "total" of these small step by finding the area under the graph for pressure vs volume give you the work done (of the gas)
        
        So when you combine this formula with the ideal and think about integration, as stated here (superior link) we get this (inferior link)
        
        Since all the values in the equation are multipled, a change in any of these value will change the amount of work done, therefore these are all factors affecting work
        
        Temp is the most important as R is constant and n will change from problem to problem and also depends on the gas in question, temp is the only intensive prop
        
        The higher the temp. the more work can be done.
        
        1 more item...
  - - - Heat transfer OUT of the system: -q (endothermic)
      - Work done BY the system: -w
      - Work done ON the system: +w
      - Heat Transfer INTO the system: +q (endothermic)