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Chemistry-

General

Easy

Question

For conversion C(graphite)→C(Diamond),the DS is-

Zero
Positive
Negative
Unknown

The correct answer is: Negative

Related Questions to study

Consider the following processes: DH(kJ/mol) ½A→B +150 3B→2C+D–125 E+A→2D+350 ForB+D→E+2C,DHillbe-

Consider the following processes: DH(kJ/mol) ½A→B +150 3B→2C+D–125 E+A→2D+350 ForB+D→E+2C,DHillbe-

chemistry-General

Enthalpy change for the reaction, 4H_(g) →2H_2(g) is–869.6kJ The dissociation energy of H–H bond is

Enthalpy change for the reaction, 4H_(g) →2H_2(g) is–869.6kJ The dissociation energy of H–H bond is

chemistry-General

ThevaluesofDHandDSforthereaction,C(graphite)+CO(g)→2CO(g)are170kJand170 JK–1respectively.Thisreactionwillbespontaneousat

ThevaluesofDHandDSforthereaction,C(graphite)+CO(g)→2CO(g)are170kJand170 JK–1respectively.Thisreactionwillbespontaneousat

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Assertion: The sum of all4 digited numbers that can be formed using the digits 1,2,4,5,6 without repetition is 479952
Reason: Sum of all $r$ ‐digit numbers formed by taking the given n digits (without zero) is (sum of all the n digits) $cross times left parenthesis n minus left parenthesis A right parenthesis blank P subscript r minus 1 end subscript cross times$ ( $111 horizontal ellipsis. r$ times).

Assertion: The sum of all4 digited numbers that can be formed using the digits 1,2,4,5,6 without repetition is 479952
Reason: Sum of all $r$ ‐digit numbers formed by taking the given n digits (without zero) is (sum of all the n digits) $cross times left parenthesis n minus left parenthesis A right parenthesis blank P subscript r minus 1 end subscript cross times$ ( $111 horizontal ellipsis. r$ times).

Assertion: There are three doors to a room The number of ways in which a student can enter the room and leave it by a different door is 6.
Reason: If an operation can be performed in $m$ ways and another operation can be perfO rmed in $n$ ways thenthe two operations in succession can be performed in mn ways.

Assertion: There are three doors to a room The number of ways in which a student can enter the room and leave it by a different door is 6.
Reason: If an operation can be performed in $m$ ways and another operation can be perfO rmed in $n$ ways thenthe two operations in succession can be performed in mn ways.

Assertion(A): The number of quadratic expressions with the coefficients drawn from the set {0,1,2,3} is only 48 but not 64.
Reason(R): The coefficient $o f subscript X to the power of 2 end exponent end subscript$ inthe quadratic expression $a x to the power of 2 end exponent plus b x plus c$ can not be $O$ ’

Assertion(A): The number of quadratic expressions with the coefficients drawn from the set {0,1,2,3} is only 48 but not 64.
Reason(R): The coefficient $o f subscript X to the power of 2 end exponent end subscript$ inthe quadratic expression $a x to the power of 2 end exponent plus b x plus c$ can not be $O$ ’

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Assertion (A) : The number of ways of arranging 6 boys and 5 girls alternately at circular table is $0$ Reason (R) : To arrange boys and girls alternately at a circular table, they should be equal in number.

Assertion (A) : The number of ways of arranging 6 boys and 5 girls alternately at circular table is $0$ Reason (R) : To arrange boys and girls alternately at a circular table, they should be equal in number.

GivenenthalpyofformationofCO2(g)andCaO(s) are–94.0KJand–152KJrespectivelyandthe enthalpyofthereaction-CaCO3(s) →CaO(s)+CO2(g) is42KJ.The enthalpyofformationofCaCO3(s)

GivenenthalpyofformationofCO2(g)andCaO(s) are–94.0KJand–152KJrespectivelyandthe enthalpyofthereaction-CaCO3(s) →CaO(s)+CO2(g) is42KJ.The enthalpyofformationofCaCO3(s)

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Change in entropy is negative for–

Change in entropy is negative for–

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The enthalpychange(DH) forthereaction,N2(g) +3H2(g) 3/4 →2NH3(g)is–92.38KJat 298K.TheinternalenergychangeDUat298Kis-

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For which one of the following equations is D H reaction equal to DH° for the product-

For which one of the following equations is D H reaction equal to DH° for the product-

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When a die is rolled twice, if the event of getting an even number is denoted by a success and the number of successes as a random variable, then distribution and mean of the variate are

When a die is rolled twice, if the event of getting an even number is denoted by a success and the number of successes as a random variable, then distribution and mean of the variate are

Enthalpy of CH4+ $fraction numerator 1 over denominator 2 end fraction$ O2→CH3OH is negative. If enthalpy of combustion of CH4 and CH3OH are x and y respectively. Then which relation is correct-

Enthalpy of CH4+ $fraction numerator 1 over denominator 2 end fraction$ O2→CH3OH is negative. If enthalpy of combustion of CH4 and CH3OH are x and y respectively. Then which relation is correct-

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