45.0 g of liquid benzene, C6H6, is isothermally vaporized at 80.1°C, its boiling point, and a constant pressure of 1.20 atm. The molar heat of vaporization of benzene is 30.8 kJ/mol. Assume the volume of the liquid is negligible. Include the sign of each answer below. (a) Calculate q, the heat for the process. kJ (b) Calculate w, the work done by the process. KJ (c) Calculate AE for the process. kJ

A student dissolves 11.9 g of sodium chloride (NaCl)in 250. g of water in a well-insulated open cup. He then observes the temperature of the water fall from 23.0 °C to 22.0 °C over the course of 6.9 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: + NaCl (s) - Na" (aq) + Ci¯ (aq) You can make any reasonable assumptions about the physical properties of the solution. Be sure answers you calculate using measured data are rounded to the correct number of significant digits. Note for advanced students: it's possible the student did not do the experiment carefully, and the values you calculate may not be the same as the known and published values for this reaction. exothermic x10 Is this reaction exothermic, endothermic, or neither? endothermic neither If you said the reaction was exothermic or endothermic, calculate the amount of heat that was released or absorbed by the reaction in this case. kJ kJ…

Calculate AGᵒrxn in kJ for the following reaction at 550.0 K. CaCO3(s) CaO(s) + CO₂(g) -89040 O 756.8 O 80.99 O 259.4 AH° +170.2 kJ; AS°= +162.2 J/K

I dont know how to do this question