5.1c Aqueous solution enthalpy change

Thermal equilibrium
    • Temperature determines the direction that heat will transfer
        ○ Heat always moves from a hotter object to a cooler object 

Thermal equilibrium-occurs when both objects reach the same temperature and the transfer of heat stops

Specific Heat Capacity

Specific Heat Capacity(c) -is the energy that must be transferred to 1kg of substance to cause its temperature to increase by 1K. 

c= Q/m∆T
Q => Heat in joules (J)
m => mass in kilograms (kg)
∆T => Change in temperature in (K)
    • ∆T= T_final  − T_inital

Different Materials and states of matter have different heat capacities

Example
If 840 J of heat is transferred to 1kg of iron, the temperature of the iron will be increased by 1K.