The presence of a liquid layer at the surface of a solid undergoing steady-state deflagration is attributable, at least in part, to collisional energy feedback from hot product species to the liquid surface. We have continued our investigation of these systems, focusing on the prototypical energetic material nitromethane and identifying those molecular degrees of freedom that participate significantly in the absorption of the collision energy. In addition, our simulations indicate that the net energy exchange in this system can be described well by a simple, one-dimensional Baule-type model, the same model that was found to yield a useful description of energy transfer at the surface of an atomic liquid.