Question

1. which process involves an increase in entropy of the system ?

A)any spontaneous process
B) combustion of paper
C) synthesis of cellulose
D) freezing of ice
E)formation of raindrops
2) A negative free energy change indicates that
A)the reaction is exothermic
B) energy must be added to the reaction before it can proceed
C) the reaction is at equilibrium
D) the reaction is not possible
E)the reactant is predominant at equilibrium
3) Energy is important to life forms because
A)it is required to do work
B)al life forms require a continuous supply of it
C) it is required to make specific alterations in the cell
D)both a and b
E) a,b and c
4) which of the following is defined as "heat content"
A) energy output
B)enthalpy
C) solar radiation
D) entropy
E)heat loss

Answer 1

A)any spontaneous process

Step-by-step explanation:

Entropy (S) is a state function that can be related to the number of microstates for a system (the number of ways the system can be arranged) and to the ratio of reversible heat to kelvin temperature. It may be interpreted as a measure of the dispersal or distribution of matter and/or energy in a system, and it is often described as representing the “disorder” of the system. For a given substance, entropy depends on phase with Ssolid < Sliquid < Sgas. For different substances in the same physical state at a given temperature, entropy is typically greater for heavier atoms or more complex molecules. Entropy increases when a system is heated and when solutions form. Using these guidelines, the sign of entropy changes for some chemical reactions and physical changes may be reliably predicted. The second law of thermodynamics states that a spontaneous process increases the entropy of the universe, Suniv > 0. If ΔSuniv < 0, the process is nonspontaneous, and if ΔSuniv = 0, the system is at equilibrium. The third law of thermodynamics establishes the zero for entropy as that of a perfect, pure crystalline solid at 0 K. With only one possible microstate, the entropy is zero. We may compute the standard entropy change for a process by using standard entropy values for the reactants and products involved in the process.