Home
Class 11
CHEMISTRY
For a certain reaction, Delta H^(0) " & ...

For a certain reaction, `Delta H^(0) " & " Delta S^(0)` respectively are 400kJ & 200 J/mol/K. The process is non-spontaneous at

A

2100K

B

2010K

C

1990K

D

2020K

Text Solution

Verified by Experts

The correct Answer is:
C
non -spontaneous `rArr Delta G gt 0`
`rARr Delta H - T Delta S gt 0 rArr 400 - (200 xx T)/(1000) gt 0`
`rArr 2000K gt T`
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL THERMODYNAMICS

    AAKASH SERIES|Exercise PRACTICE SHEET (EXERCISE- III) (LEVEL- II (ADVANCED) (STRAIGHT OBEJCETIVE TYPE QUESTIONS)|9 Videos

  • CHEMICAL THERMODYNAMICS

    AAKASH SERIES|Exercise PRACTICE SHEET (EXERCISE- III) (LEVEL- II (ADVANCED) (MORE THAN ONE CORRECT ANSWER TYPE QUESTIONS)|8 Videos

  • CHEMICAL THERMODYNAMICS

    AAKASH SERIES|Exercise PRACTICE SHEET (EXERCISE- II) (LEVEL- II (ADVANCED) INTEGER TYPE QUESTIONS)|6 Videos

  • CHEMICAL THERMODYANMICS

    AAKASH SERIES|Exercise Questions For Descriptive Answers|28 Videos

  • ELECTRON MIGRATION EFFECTS

    AAKASH SERIES|Exercise QUESTIONS FOR DESCRIPTIVE ANSWERS|10 Videos

Similar Questions

Explore conceptually related problems

For a reaction R_(1), Delta G = x KJ mol^(-1) . For a reaction R_(2), Delta G = y KJ mol^(-1) . Reaction R_(1) is non-spontaneous but along with R_(2) it is spontaneous. This means that

Suppose that a reaction has Delta H= -400kJ and Delta S = - 50J//K . A t what temperature range will it change from spontaneous to non-spontaneous?

For A _((g)) + B _((s)) to 2 C _((g)) , Delta H and Delta S respectively are 50 KJ and 100 J/K respectively. Then at 228 ^(@)C

Delta S for 4Fe _((s)) + 3 O _(2(g)) to 2 Fe _(2) O _(3 (s)) is -550 J/mole/K.The process is found to be spontaneous even at 298K because [Delta H =- 1660kJ]

For A + B hArr C + D ,Delta H = -Q KJ , K_(f) & K_(b) respectively are 0.25 & 5000 at 400 K . Now ,K_(c) for same process at 500 K may be

DeltaH and DeltaS for certain reaction are -10KJ and - 44J/K, DeltaG^@ is