JEE Mains · Chemistry · STD 11 - 5. Thermodynamics and thermochemistry
Given \((A)\) \(2 CO ( g )+ O _2( g ) \rightarrow 2 CO _2( g ) \quad \Delta H _1^\theta=- x\,kJ\,mol { }^{-1}\) \((B)\) \(C\) (graphite) \(+ O _2\) (g) \(\rightarrow CO _2\) (g) \(\Delta H _2^\theta=- y\,kJ\,mol -1\) The \(\Delta H ^\theta\) for the reaction \(......\).\(C (\) graphite \()+\frac{1}{2} O _2( g ) \rightarrow CO ( g )\) is
- A \(\frac{x-2 y}{2}\)
- B \(\frac{x+2 y}{2}\)
- C \(\frac{2 x - y }{2}\)
- D \(2 y-x\)
Answer & Solution
Correct Answer
(A) \(\frac{x-2 y}{2}\)
Step-by-step Solution
Detailed explanation
Target equation \(C \text { (graphite) }+\frac{1}{2} O _{2( g )} \rightarrow CO _{( g )} \ldots \text {.(i) } \Delta H\) \(C \left(\text { graphite) }+ O _{2( g )} \rightarrow CO _{2( g )} \text {.(ii) } \Delta H _1=- y\,kJ / mole \right.\)…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Chemistry
- The electronic configuration for Neodymium is: [Atomic Number for Neodymium \(60\)]JEE Mains 2024 Hard
- \(A + 2B \rightarrow AB_{2}\).
36.0 g of 'A' (Molar mass: \(60~g~mol^{-1}\)) and 56.0 g of 'B' (Molar mass: \(80~g~mol^{-1}\)) are allowed to react. Which of the following statements are correct?
(A) 'A' is the limiting reagent
(B) 77.0 g of \(AB_{2}\) is formed
(C) Molar mass of \(AB_{2}\) is \(140~g~mol^{-1}\)
(D) 15.0 g of A is left unreacted after the completion of reaction.
Choose the correct answer from the options given below :JEE Mains 2026 Hard - What would be the \(pH\) of a solution obtained by mixing \(5\,g\) of acetic acid and \(7.5\,g\) of sodium acetate and making the volume equal to \(500\, mL\) ? \((K_a = 1.75 \times 10^{-5},pK_a =4.76)\)JEE Mains 2013 Hard
- Molar mass of the salt from \(NaBr , NaNO _3, KI\) and \(CaF _2\) which does not evolve coloured vapours on heating with concentrated \(H _2 SO _4\) is _______ \(g mol ^{-1}\).
(Molar mass in \(\text{g mol} ^{-1}: Na : 23, N: 14, K: 39, O : 16, Br : 80,\) \(I : 127, F: 19, Ca : 40)\)JEE Mains 2024 Medium - What amount of bromine will be required to convert 2 g of phenol into 2,4,6-tribromophenol? (Given molar mass in \(\mathrm{g} \mathrm{mol}^{-1}\) of \(\mathrm{C}, \mathrm{H}, \mathrm{O}, \mathrm{Br}\) are \(12,1,16,80\) respectively )JEE Mains 2025 Medium
- \(\mathrm{KMnO}_4\) decomposes on heating at \(513 \mathrm{~K}\) to form \(\mathrm{O}_2\) along with _______.JEE Mains 2024 Hard
More PYQs from JEE Mains
- If the sum of series \(\frac{1}{1 \cdot(1+d)}+\frac{1}{(1+d)(1+2 d)}+\ldots \ldots+\frac{1}{(1+9 d)(1+10 d)}\) is equal to \(5\) , then \(50 \mathrm{~d}\) is equal to :JEE Mains 2024 Hard
- The angle of elevation of the top \(P\) of a vertical tower \(PQ\) of height \(10\) from a point \(A\) on the horizontal ground is \(45^{\circ}\). Let \(R\) be a point on \(AQ\) and from a point \(B\), vertically above \(R\), the angle of elevation of \(P\) is \(60^{\circ}\). If \(\angle BAQ =30^{\circ}, AB = d\) and the area of the trapezium \(PQRB\) is \(\alpha\), then the ordered pair \(( d , \alpha)\) is.JEE Mains 2022 Hard
- For \(LED's\) to emit light in visible region of electromagnetic light, it should have energy band gap in the range ofJEE Mains 2014 Medium
- During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute temperature. The ratio of \(\frac{C_p}{C_v}\) for the gas is:JEE Mains 2024 Hard
- Number of molecules/ions from the following in which the central atom is involved in \(\mathrm{sp}^3\) hybridization is _______.
\(\mathrm{NO}_3^{-}, \mathrm{BCl}_3, \mathrm{ClO}_2^{-}, \mathrm{ClO}_3\)JEE Mains 2024 Medium - Among the following vitamins the one whose deficiency causes rickets (bone deficiency) isJEE Mains 2013 Easy