Determine wether HgO(s) spontaneously decomposes into Hg(l) and O2(g) at 120 degrees Celsius.

) A chemical reaction that has a positive Δ G is correctly described as A) endergonic. B) endothermic. C) enthalpic. D) spontaneous. E) exothermic.

18,19 plz

38. For this process at 25 °C: H2O(g) H2O (A) AH is negative as energy is released. (B) AH is negative as energy is absorbed. (C) AH is positive as energy is released. (D) AH is positive as energy is absorbed.

Calculate the standard enthalpy change for the reaction at 25 ∘C. Standard enthalpy of formation values can be found in this list of thermodynamic properties. 2CH3OH(g)+3O2(g)----> 2CO2(g)+4H2O(g)

1. Argon is allowed to expand isothermally (at 298 K) and reversibly from an initial molar volume of 5.0 L/mol to a final molar volume of 11 L/mol. (a) Calculate the work (in units of kJ to 4 sig. figs.) done assuming it behaves as an ideal gas (b) Calculate the work (in units of kJ to 4 sig. figs) assuming it is non-ideal using the van der Waals equation where a = 1.34 atm L2 mol-2 b = 3.20 x 10-2 L mol-1

A 104.4mL sample of 1.8M HNO3 is mixed with a 800mL sample of 0.5M KOH in a Styrofoam cup. If both solutions were initially at 25.2\deg C, and the enthalpy of the neutralization reaction is -57 kJ/mole of H2O formed, what is the final temperature of the mixture? The volume of the formed H2O can be ignored. Assume that the solution has a density of 1.00 g/mL and a specific heat of 4.184 J/g\deg C, and that the Styrofoam cup has an insignificant heat capacity. (enter one decimal place)