Measurements show that the enthalpy of a mixture of gaseous reactants decreases by 293.kJ during a certain chemical reaction, which is carried out at a constant pressure. Furthermore, by carefully monitoring the volume change it is determined that 71.kJ of work is done on the mixture during the reaction.Calculate the change in energy of the gas mixture during the reaction. Be sure your answer has the correct number of significant digits. kJIs the reaction exothermic or endothermic? exothermicendothermic

The enthalpy of a reaction is +270 kJ/mol. What can you determine about the reaction?A.It is exothermic.B.It is nonspontaneous.C.It is endothermic.D.It is spontaneous.

A sample of an ideal gas in the cylinder of an engine is compressed against a constantpressure by having 284 J of work done on it during the compression stroke. At thesame time, 140 J of energy is transferred from the gas to the surroundings as heat.What is the total change in the internal energy (ΔU) of the gas in Joules?

An ideal gas has a gas constant R = 0.3 kJ/kg-K and a constant-volume specific heat Cv = 0.7 kJ/kg-K. If the gas has a temperature change of 100 degrees C, what is the change in enthalpy?Question 2Select one:a.30 kJ/kgb.70 kJ/kgc.100 kJ/kgd.insufficient information to determine

If the heat of reaction, that is the enthalpy change ΔH, for a certain process, is +32 kJ, that process Question 3Select one:a.occurs rapidlyb.is exothermicc.is endothermicd.cannot occure.requires a catalyst

(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.