Calculate the change in entropy associated with freezing of 0.072 mol of C2 H 5 OHat 158.7 K given that the enthalpy of freezing is 4.60 kJ mol-1 .

calculate the change in entropy that occurs in the system when 1.80 mol of isopropyl alcohol (C3H8O) melts at its melting point (-89.5°C). ΔH°fus = 5.37 kJ/mol.Express your answer in joules per kelvin to three significant figures.

Calculate the standard entropy change for the reaction:C8 H 18 (l) + 25 ⁄2 O 2 (g) ® 8 CO 2 (g) + 9 H 2 O (g)given the following information:Substance S° [J mol-1 K -1 )]C8 H 18 329.3O 2 205.2CO 2 213.8H 2 O 70.0

The heat of vaporization AH vap, of carbon tetrachloride, CCl4, at 250C: CCL4(1) CCL4 (g); Hvap=39.4 kJ/mol If 0.5 mol of liquid carbon tetrachloride at 25*C has an entropy of 108 J/K, what is the entropy of 0.25 mol of the vapor in equilibrium with the liquid at this temperature?

(ii) Show that the heat energy change, Q, in the student’s experiment is about 1100 J.[for the mixture, c = 4.2 J/g/°C][massof1.0 cm 3of mixture = 1.0 g] (3)(iii) The student uses 0.020 mol of potassium hydroxide in his experiment.Calculate the enthalpy change (ΔH) in kJ/mol, for 1.0 mol of potassium hydroxide.Include a sign in your answer.

Youhcl + naoh --> nacl + h2o. 200cm^3 of 0.2 mol/dm^3 hcl was reacted with 100 cm^3 of 0.15 mol/dm^3 naoh, where the enthalphy change is -57.3 kJ. find the overall enthalpy change using moles