Constraining entropy and temperature of the universe from recent OHD and Pantheon plus sample

In this paper, we investigate a model of transitioning universe which demonstrates a shift from initial deceleration phase to current accelerating phase by proposing a new parameterization of the Hubble parameter as [Formula: see text], where [Formula: see text], [Formula: see text] and [Formula: see text] are the free model parameters and [Formula: see text] denotes the value of Hubble parameter at present epoch. We extract these free parameters by bounding our model with OHD and Pantheon plus sample with an application of statistical evaluation and utilizing Bayesian MCMC method. From this study, we observed that the entropy of the universe increases with decreasing value of redshift, therefore, the entropy of the universe increases with universes evolution. We also found that the cosmological constant [Formula: see text] is decreasing function of time, which is supported by results from SN Ia observations. Furthermore, we estimate the entropy and temperature of the universe, utilizing OHD and Pantheon plus sample. Some physical and geometric behaviors of the universe are also discussed.