Consider the following reaction at constant P. Use the information here to determine the value of ?Ssurr at 398 K. Predict whether or not this reaction will be spontaneous at this temperature. 4 NH3(g) + 3 O2(g) ? 2 N2(g) + 6 H2O(g) ?H = -1267 kJ
A) ?Ssurr = +12.67 kJ/K, reaction is not spontaneous
B) ?Ssurr = -12.67 kJ/K, reaction is spontaneous
C) ?Ssurr = +50.4 kJ/K, reaction is not spontaneous
D) ?Ssurr = +3.18 kJ/K, reaction is spontaneous
E) ?Ssurr = -3.18 kJ/K, it is not possible to predict the spontaneity of this reaction

C, correct me if im wrong

Explanation:

given:

mass of na = 115 g

excess cl2

to determine:

mass of nacl produced

explanation:

given reaction is-

2na(s) + cl2(g) → 2nacl(s)

since cl2 is in excess, na will be the limiting reagent

as per the reaction stoichiometry na: nacl = 1: 1

i.e. moles of na reacted = moles of nacl formed

now, # moles of na = mass of na/atomic mass

                                  = 115 g/23 g.mol-1 = 5 moles

therefore, moles of nacl = 5

molar mass of nacl = 58 g/mol

mass of nacl = 5 moles * 58 g.mol-1 = 290 g

ans: amount of nacl produced = 290 g

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.