Gradient in arrow and text (node) in tikz

Question

Is there a way to make the down pointed arrow a gradient between two colors and have the text have that gradient too? (BrickRed and NavyBlue)

\documentclass[a4paper, 11pt]{article}
\usepackage[utf8]{inputenc}
\usepackage[dvipsnames]{xcolor}
\usepackage{chemformula}
\usepackage{float}
\usepackage{tikz}
\usepackage{pgfplots}
\begin{document}
\begin{figure}[H]
\centering
\begin{tikzpicture}
\draw[very thick, ->] (0,0) -- (0,4) node[left]  {$H$};
\draw[BrickRed, very thick] (0.25, 3.5) -- (3, 3.5) node[midway, above] {\ch{C (s) + O2 (g)}}; 
\draw[shading=grad, thick, ->] (2.75, 3.5) -- (2.75, 0.5) node[midway, right] {$\Delta H=-282.5 ,\mathrm{kJ}$};

\draw[NavyBlue, very thick] (2.5, 0.5) -- (5.75, 0.5) node[midway, above] {\ch{CO2 (g)}};
\end{tikzpicture}
\caption{Exemplo de um diagrama de entalpia de uma reação exotérmica}
\end{figure}
\end{document}