Air in a piston–cylinder assembly undergoes a process from state 1, where T1 = 300 K, p1 = 100 kPa, to state 2, where T2 = 500 K, p2 = 650 kPa. Using the ideal gas model for air, determine the change in specific entropy between these states, in kJ/kg ⋅ K, if the process occurs (a) without internal irreversibilities, (b) with internal irreversibilities.

the law of conservation of mass states that in a chemical reaction, the total mass of reactants is equal to the total mass of products. because atoms are only rearranged in a chemical reaction, there must be the same number of sodium atoms and chlorine atoms in both the reactants and products

just did the assignment and the answer was #1 +2 n

the answer is d.) potassium