Question

Meaning of delta symbol in chemical reaction

Answer 1

the meaning of delta symbol is small change.
when it is used in chemistry it denotes change in enthalpy whereas it also denotes that heat is added in the reaction. It is represented with
a triangle symbol.

Answer 2

Answer
actually just means "the change in". e.g. Δ
H = the change in enthalpy.
Explanation:
Upper case Greek Delta (Δ) signifies the change in a specific quantity. For example, if temperature T changes from
100 o C to 80 o C
, we would say
ΔT = 20 o C
This should not be confused with lower case Greek Delta (δ) which is often used to denote partial charges on the atoms found in polar bonds.