X s X 1 8 Which of the following is true for any substance

Last updated: 4/28/2023

X s X 1 8 Which of the following is true for any substance undergoing the process represented above at its normal melting point hint this process is at equilibrium 9 10 a AS 0 b AH 0 c AH TAG d AH TAS Ba OH 2 8H O s 2NH4SCN s Ba SCN 2 aq 2NH3 aq 10H O s When solid samples of barium hydroxide and ammonium thiocyanate are mixed in a test tube the outside of the test tube becomes noticeably cool to the touch Which gives the correct signs for the thermodynamic parameters for such a spontaneous endothermic dissolving process AG soln a b c d AH soln AS soln N g 3H2 g 2NH3 g The reaction indicated above is thermodynamically favorable at 298 K but becomes unfavorable at higher temperatures Which of the following is true at 298 K a AG AH and AS are all positive b AG AH and AS are all negative c AG and AH are negative but AS is positive d AG and AS are negative but AH is positive 11 Which describes the direction of changes in enthalpy and entropy for an endothermic dissolving process of an ionic solute in water at constant pressure a Enthalpy increases and entropy decreases b Enthalpy decreases and entropy increases c Both enthalpy and entropy decrease d Both enthalpy and entropy increase