Answer:
A reaction in which the entropy of the system decreases can be spontaneous only if it is exothermic.
Explanation:
The spontaneity of a reaction depends on the Gibbs free energy(ΔG).
- If ΔG < 0, the reaction is spontaneous.
- If ΔG > 0, the reaction is nonspontaneous.
ΔG is related to the enthalpy (ΔH) and the entropy (ΔS) through the following expression:
ΔG = ΔH - T.ΔS
where,
T is the absolute temperature (always positive)
Regarding the exchange of heat:
- If ΔH < 0, the reaction is exothermic.
- If ΔH > 0, the reaction is endothermic.
<em>Which statement is true? </em>
<em>A reaction in which the entropy of the system decreases can be spontaneous only if it is exothermic. </em>TRUE. If ΔS < 0, the term -T.ΔS > 0. ΔG can be negative only if ΔH is negative.
<em>A reaction in which the entropy of the system increases can be spontaneous only if it is endothermic.</em> FALSE. If ΔS > 0, the term -T.ΔS < 0. ΔG can be negative if ΔH is negative.
<em>A reaction in which the entropy of the system decreases can be spontaneous only if it is endothermic.</em> FALSE. If ΔS < 0, the term -T.ΔS > 0. ΔG cannot be negative if ΔH is positive.
<em>A reaction in which the entropy of the system increases can be spontaneous only if it is exothermic.</em> FALSE. If ΔS > 0, the term -T.ΔS < 0. ΔG can be negative even if ΔH is positive, as long as |T.ΔS| > |ΔH|.
Which of the following statements is generally true about change in the workplace ? a ) Most people accept change easily . b) Smart companies can avoid change altogether. c) Change in the workplace fairly infrequently d) Individuals can learn to manage the change in their lives.
Answer:
Explanation: Organic chemistry have a wide variety from compounds of the presence of two elements namely
Organic molecules comprises of multiple chains of carbon atoms with different lengths and because of the ability of carbon to bond with many elements, This produces a variety of compounds which no other atom or element can. The main variety of compounds exists in the combination of carbon and hydrogen forming hydrocarbons which are virtuall everywhere around us
Solution :
According to Henry's law of solubility, we have c = kp
Henry's law constant, 
= 0.0007 mol/L.atm
When the pressure is = 4 atm
The solubility is c = 0.0007 mol/(L.atm) x 4 atm
= 0.0028 mol/L
Therefore, in a 5 liter of blood, the moles of nitrogen dissolved
= 0.0028 x 5
= 0.014 moles
At the surface, the solubility is = 0.00056 mol/L
So the moles of the nitrogen dissolved = 5 x 0.00056
= 0.0028 moles
Therefore, the number of moles of nitrogen released = 0.014 - 0.0028
= 0.0112 moles
Given total pressure = 1 atm
Temperature = 37 degree C
= 37 + 273
= 310 K
R = 
Therefore, volume of the nitrogen is
= 0.285 L
