हिंदी

Answer the following in one or two sentences. State second law of thermodynamics in terms of entropy.

Advertisements
Advertisements

प्रश्न

Answer the following in one or two sentences.

State second law of thermodynamics in terms of entropy.

टिप्पणी लिखिए
Advertisements

उत्तर १

Statement: “The second law of thermodynamics states that total entropy of a system and its surroundings increases in a spontaneous process.”

For the process to be spontaneous,

`triangle "S"_"total" = triangle "S"_"sys" + triangle "S"_"surr"` > 0.

shaalaa.com

उत्तर २

Second law of thermodynamics in terms of entropy:
The second law of thermodynamics states that, “The total entropy of the system and its surroundings (universe) increases in a spontaneous process”.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 4: Chemical Thermodynamics - Exercises [पृष्ठ ८७]

APPEARS IN

बालभारती Chemistry [English] Standard 12 Maharashtra State Board
अध्याय 4 Chemical Thermodynamics
Exercises | Q 2.6 | पृष्ठ ८७

संबंधित प्रश्न

Define entropy.


In which of the following, entropy of the system decreases?


Answer the following in one or two sentences.

State whether ΔS is positive, negative or zero for the reaction 2H(g)  →  H2(g). Explain.


Answer the following in one or two sentences.

If the enthalpy change of a reaction is ∆H how will you calculate the entropy of surroundings?


Answer the following question.

Obtain the relation between ΔG and `triangle "S"_"total"`. Comment on the spontaneity of the reaction.


Equilibrium constant for a reaction is 20. What is the value of ΔG° at 300 K? (R = 8 x 10-3 kJ)


What is the entropy change (in J K−1 mol−1) when one mole of ice is converted into water at 0°C? (The enthalpy change for the conversion of ice to liquid water is 6.0 kJ mol−1 at 0°C)


In how many of the following, ∆S is positive?

i. Melting of ice

ii. Sublimation of iodine

iii. Dissolution of CuSO4 in water

iv. Condensation of water vapour

v. Dissociation of H2 molecule into atoms

vi. Conversion of carbon dioxide gas to dry ice

vii. Vaporization of acetone


In which of the following, ∆S is positive?


For the reaction:

\[\ce{2Cl_{(g)} -> Cl2_{(g)}}\]


Which one of the following has ΔS0 greater than zero?


Equilibrium constant for a reaction is 20. What is the value of ∆G0 at 300 K? (R = 8 × 10−3 kJ)


Which of following is residual entropy of a substance?


Calculate the amount of heat liberated during formation of 2. 7 kg of water if heat of formation of water is - 284.5 kJ mol-1.


The equilibrium constant for a reaction is 10, value of ΔG° at 300 K is (R = 8 × 10-3 kJ)


When will be change in Gibb's free energy always negative?


A reaction is spontaneous at low temperatures but non-spontaneous at high temperatures. Which of the following is true for the reaction?


The criterion for a spontaneous process is ______.


Dinitrogen and dioxygen combined to form nitrous oxide in equilibrium at 850 K. The equilibrium constant for this reaction is 0.56. If the equilibrium concentration of nitrous oxide gas is 3 × 10-3 M and both dinitrogen and dioxygen have the same concentration, then what will be the concentration of dinitrogen gas in M?


Write the correct condition for spontaneity in terms of Gibbs energy.


Identify whether the following pair have larger entropy or not. If yes then Why?

He(g) in a volume of 1 L or He(g) in a volume of 5 L both at 25°C.


Identify whether the following pair have a larger entropy or not. If yes then Why?

C2H5OH(l) or C2H5OH(g)


Calculate ΔG for ΔH = − 110 kJ, ΔS = + 40 J K−1 at 400 K.


Define second law of thermodynamics.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×