∆H = Enthalpy
∆E = ∆U = Energy change
P = Pressure
Q/q = Heat
∆V = Difference in volume
C = Heat Capacity
s = Specific Heat capacaty
w = work
K = Equ
$K_p$

Energy change = heat + work
$∆U = q+w$
At constant pressure (true for most reactions:
$w = -P +∆V$