From the following data at 25anddeg;CWhich of the following statement(s) is/are correct :Statement(a) : andDelta;rHanddeg; for the reaction H2O(g) andrarr; 2H(g) + O(g) is 925 kJ/molStatement(b) : andDelta;rHanddeg; for the reaction OH(g) andrarr; H(g) + O(g) is 502 kJ/molStatement(c) : Enthalpy of formation of H(g) is-andndash;218 kJ/molStatement(d) : Enthalpy of formation of OH(g) is 42 kJ/mola)Statement cb)Statement a, b, dc)Statement b,cd)Statement a, dCorrect answer is option 'D'. Can you explain this answer?

EduRev

All Courses

Explore Courses UPSC Exam UPSC Test Series Free Notes EduRev Infinity

Open App

Class 11 Exam > Class 11 Questions > From the following data at 25°CWhich of t...

Join the Discussion on the App

From the following data at 25°C

Which of the following statement(s) is/are correct :
Statement(a) : Δ_rH° for the reaction H₂O(g) → 2H(g) + O(g) is 925 kJ/mol
Statement(b) : Δ_rH° for the reaction OH(g) → H(g) + O(g) is 502 kJ/mol
Statement(c) : Enthalpy of formation of H(g) is-–218 kJ/mol
Statement(d) : Enthalpy of formation of OH(g) is 42 kJ/mol

a)
Statement c
b)
Statement a, b, d
c)
Statement b,c
d)
Statement a, d

Correct answer is option 'D'. Can you explain this answer?

FREE This question is part of

Test: Thermochemistry

Attempt Test

Attempt this Test

Verified Answer

From the following data at 25°CWhich of the following statement(s)...

Let's check statement (a)
Statement(a) : ΔrH° for the reaction H₂O(g) → 2H(g) + O(g) is 925 kJ/mol
For this, we need - (II) + (III) + ½ (IV)
We get, H₂O(g) → 2H(g) + O(g) - (-242)+436+½ 495 = 925.5 kJ mol^-1
So it is true.
Let's check statement (b)
Statement(b) : ΔrH° for the reaction OH(g) → H(g) + O(g) is 502 kJ/mol
For this we need -(I)+½ (III)+½ (IV)
We get OH(g) → H(g) + O(g) -(42) + ½ (436) + ½ (495) = 423.5 kJ mol-1
So statement (b) is wrong.
Let's check statement (c)
Statement(c) : Enthalpy of formation of H(g) is -218 kJ/mol
We can see that for enthalpy of formation, we need to divide eqn (III) by 2
So, it would become :-
½ H₂(g) → H(g)
436/2 = 218 kJ
So, statement (c) is wrong.
Let's check statement (d)
Statement(d) : Enthalpy of formation of OH(g) is 42 kJ/mol
For that, we have eqn (I) as it is. So, statement (d) is correct.

View all questions of this test

View all answers Start learning for free

< Previous Question Next Question >

Explore Courses for Class 11 exam

Similar Class 11 Doubts

Direction (Q. Nos. 14) This sectionis based on statement I and Statement II. Select the correct answer from the code given below.Q.Statement I : Based on the following thermochemical reactions :Ionisation of HF(aq)is an exothermic reaction. Statement II : Enthalpy decrease in hydration of H+ (aq) and F-(aq) exceeds the ionisation energy of HF.

View answer

Standard Molar Enthalpy of Formation is

View answer

STATEMENT-1A cloth Covers a table. Some dishes are kept on it. The cloth can be pulled out without dislodging the dishes from the tablebecauseSTATEMENT-2For every action there is an equal and opposite reaction

View answer

EXAMPLE 5. The reaction of cyanamide NH_{2}CN(s) with dioxygen was carried out in a bomb calorimeter, and Al was found to be-742.7 kJ mol at 298 K. Calculate the enthalpy change for the reaction at 298 K (R=8.314\times10^{-3}kJK^{-1}mol^{-1}) , NH₂CN()+ O2(g) N_{2}(g)+CO_{2}(g)+H_{2}O(l)?

View answer

On which of the following factors the enthalpy change of a reaction is NOT dependent?

View answer

Top Courses for Class 11View all

Chemistry Class 11

CUET Mock Test: Humanities Subjects 2025

English Class 11

Mathematics (Maths) Class 11

Psychology Practice Tests: CUET Preparation

Top Courses for Class 11

View all

From the following data at 25°CWhich of the following statement(s) is/are correct :Statement(a) : ΔrH° for the reaction H2O(g) → 2H(g) + O(g) is 925 kJ/molStatement(b) : ΔrH° for the reaction OH(g) → H(g) + O(g) is 502 kJ/molStatement(c) : Enthalpy of formation of H(g) is-–218 kJ/molStatement(d) : Enthalpy of formation of OH(g) is 42 kJ/mola)Statement cb)Statement a, b, dc)Statement b,cd)Statement a, dCorrect answer is option 'D'. Can you explain this answer?

Share with a Friend

Answer this doubt

Question Description
From the following data at 25°CWhich of the following statement(s) is/are correct :Statement(a) : ΔrH° for the reaction H2O(g) → 2H(g) + O(g) is 925 kJ/molStatement(b) : ΔrH° for the reaction OH(g) → H(g) + O(g) is 502 kJ/molStatement(c) : Enthalpy of formation of H(g) is-–218 kJ/molStatement(d) : Enthalpy of formation of OH(g) is 42 kJ/mola)Statement cb)Statement a, b, dc)Statement b,cd)Statement a, dCorrect answer is option 'D'. Can you explain this answer? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about From the following data at 25°CWhich of the following statement(s) is/are correct :Statement(a) : ΔrH° for the reaction H2O(g) → 2H(g) + O(g) is 925 kJ/molStatement(b) : ΔrH° for the reaction OH(g) → H(g) + O(g) is 502 kJ/molStatement(c) : Enthalpy of formation of H(g) is-–218 kJ/molStatement(d) : Enthalpy of formation of OH(g) is 42 kJ/mola)Statement cb)Statement a, b, dc)Statement b,cd)Statement a, dCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for From the following data at 25°CWhich of the following statement(s) is/are correct :Statement(a) : ΔrH° for the reaction H2O(g) → 2H(g) + O(g) is 925 kJ/molStatement(b) : ΔrH° for the reaction OH(g) → H(g) + O(g) is 502 kJ/molStatement(c) : Enthalpy of formation of H(g) is-–218 kJ/molStatement(d) : Enthalpy of formation of OH(g) is 42 kJ/mola)Statement cb)Statement a, b, dc)Statement b,cd)Statement a, dCorrect answer is option 'D'. Can you explain this answer?.

Solutions for From the following data at 25°CWhich of the following statement(s) is/are correct :Statement(a) : ΔrH° for the reaction H2O(g) → 2H(g) + O(g) is 925 kJ/molStatement(b) : ΔrH° for the reaction OH(g) → H(g) + O(g) is 502 kJ/molStatement(c) : Enthalpy of formation of H(g) is-–218 kJ/molStatement(d) : Enthalpy of formation of OH(g) is 42 kJ/mola)Statement cb)Statement a, b, dc)Statement b,cd)Statement a, dCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 11. Download more important topics, notes, lectures and mock test series for Class 11 Exam by signing up for free.

Here you can find the meaning of From the following data at 25°CWhich of the following statement(s) is/are correct :Statement(a) : ΔrH° for the reaction H2O(g) → 2H(g) + O(g) is 925 kJ/molStatement(b) : ΔrH° for the reaction OH(g) → H(g) + O(g) is 502 kJ/molStatement(c) : Enthalpy of formation of H(g) is-–218 kJ/molStatement(d) : Enthalpy of formation of OH(g) is 42 kJ/mola)Statement cb)Statement a, b, dc)Statement b,cd)Statement a, dCorrect answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of From the following data at 25°CWhich of the following statement(s) is/are correct :Statement(a) : ΔrH° for the reaction H2O(g) → 2H(g) + O(g) is 925 kJ/molStatement(b) : ΔrH° for the reaction OH(g) → H(g) + O(g) is 502 kJ/molStatement(c) : Enthalpy of formation of H(g) is-–218 kJ/molStatement(d) : Enthalpy of formation of OH(g) is 42 kJ/mola)Statement cb)Statement a, b, dc)Statement b,cd)Statement a, dCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for From the following data at 25°CWhich of the following statement(s) is/are correct :Statement(a) : ΔrH° for the reaction H2O(g) → 2H(g) + O(g) is 925 kJ/molStatement(b) : ΔrH° for the reaction OH(g) → H(g) + O(g) is 502 kJ/molStatement(c) : Enthalpy of formation of H(g) is-–218 kJ/molStatement(d) : Enthalpy of formation of OH(g) is 42 kJ/mola)Statement cb)Statement a, b, dc)Statement b,cd)Statement a, dCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of From the following data at 25°CWhich of the following statement(s) is/are correct :Statement(a) : ΔrH° for the reaction H2O(g) → 2H(g) + O(g) is 925 kJ/molStatement(b) : ΔrH° for the reaction OH(g) → H(g) + O(g) is 502 kJ/molStatement(c) : Enthalpy of formation of H(g) is-–218 kJ/molStatement(d) : Enthalpy of formation of OH(g) is 42 kJ/mola)Statement cb)Statement a, b, dc)Statement b,cd)Statement a, dCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice From the following data at 25°CWhich of the following statement(s) is/are correct :Statement(a) : ΔrH° for the reaction H2O(g) → 2H(g) + O(g) is 925 kJ/molStatement(b) : ΔrH° for the reaction OH(g) → H(g) + O(g) is 502 kJ/molStatement(c) : Enthalpy of formation of H(g) is-–218 kJ/molStatement(d) : Enthalpy of formation of OH(g) is 42 kJ/mola)Statement cb)Statement a, b, dc)Statement b,cd)Statement a, dCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice Class 11 tests.

Explore Courses for Class 11 exam