Two solid spheres of identical shape, surface area, and mass, Sphere X and Sphere Y, are heated to an initial temperature of \(80\text{ }^\circ\text{C}\). The specific heat capacity of Sphere X is twice that of Sphere Y. Both spheres are submerged into identical, large water baths maintained at a constant temperature of \(20\text{ }^\circ\text{C}\). It is observed that Sphere Y reaches thermal equilibrium with the bath in significantly less time than Sphere X. Which of the following best explains this observation?