Bissoy.com
Doctors Medicines MCQs Q&A

Choose the reaction expected to have the greatest decrease in entropy.

Choose the reaction expected to have the greatest decrease in entropy. Correct Answer 2 Na(s) + O2(g) ? Na2O2(s)

B-In general, gases have much higher entropy than either liquids or solids. For this reason, the predictions depends primarily upon which reaction results in the greatest decrease in the number of moles of gas. A and D both result in an increase in the number of moles of gas, so there is an increase in entropy. C shows no change in the number of moles of gas; therefore, the change in entropy will be small.

Related Questions

Which one of the following sets is incorrect to show the inter-relationships among price elasticity coefficient, change in price and change in total revenue ? Price elasticity coefficient Change in price Change in Total Revenue 1) Zero Increase Decrease Increase Decrease (2) Less than 1 Increase Decrease Decrease Increase (3) Equal to 1 Increase Decrease No change No change (4) More than 1 Increase Decrease Decrease Increase  
Which of the following statements pertaining to entropy are correct? 1. The entropy of a system reaches its minimum value when it is in a state of equilibrium with its surroundings 2. Entropy is conserved in all reversible processes 3. Entropy of a substance is least in solid phase 4. Entropy of a solid solution is not zero at absolute zero temperature
For the reaction, A = X + Y, the respective concentrations are CA, CX and CY. The forward reaction rate constant is kf and the backward reaction rate constant is kb. Choose the correct statement from the following:
P. At equilibrium, kf CA > kB CxCy
Q. If the reaction is irreversible than, kb CXCY = 0
R. The backward reaction rate will essentially be first order, if the forward reaction rate is first order.
S. Activation energy for the first order forward reaction will be independent of temperature.
Which of the following reactions is expected to have the greatest decrease in entropy?
The entropy increase due to internal irreversibility is also called entropy production or entropy generation.
Entropy of dry-saturated vapor when Sf is 0.2513 and Sfg is 4.7878, is _______ Sf – Entropy of saturated liquid at pressure p Sfg – Entropy change during vaporization
Extra configurational entropy can also be introduced into the surface by the formation of surface vacancies. Entropy effects γ is slightly dependent on temperature and is given as, γ = -2T+2. Calculate the entropy S from the given condition?
Steam undergoes isentropic expansion in a turbine from 5000 kPa and 400°C (entropy = 6.65 kJ/kg.K) to 150 kPa) (entropy of saturated liquid = 1.4336 kJ/kg.K, entropy of saturated vapour = 7.2234 kJ/kg.K) The exit condition of steam is
"BDL Ltd. is currently preparing its cash budget for the year to 31 March 20XX. An extract from its sales budget for the same year shows the following sales values.
Rs
March 60,000
April 70,000
May 55,000
June 65,000
40% of its sales are expected to be for cash. Of its credit sales, 70% are expected to pay in month after sale and take a 2% discount. 27% are expected to pay in the second month after the sale, and the remaining 3% are expected to be bad debts. The value of sales budget to be shown in the cash budget for May 20XX is"
A chain growth polymerisation reaction consists of three different types of reaction namely initiation reaction, propagation reaction & termination reaction. Chain growth polymerisation reaction is not involved in the manufacture of