 This paper examines the behavior of a hybrid nanofluid consisting of cobalt ferrite, co-Phe-204, and copper, CU, nanoparticles in a porous medium undergoing unsteady motion due to an expanding surface. The effects of various parameters such as second-order velocity slip conditions, chemical reactions, heat absorption slash generation, temperature-dependent viscosity, and Darcy Forchheimer forces were analyzed. The results showed that increasing the amount of CU or Fe-204 particles increased the rate of heat and mass transfer while varying the second-order velocity slip condition had little effect on the overall performance. Additionally, the presence of chemical reactions and temperature-dependent viscosities had a significant impact on the overall performance of the hybrid nanofluid. This article was authored by Murtaza Sakib, Qumam Pum, Bilal Muhammad, and others.