For the first order thermal decomposition reaction, following dat… - Vidyadip

Question

For the first order thermal decomposition reaction, following data were obtained:

$C_2H_5Cl(g)$	$\xrightarrow{\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }}$	$C_2H_4(g) + HCl(g)$
Time/sec		Total pressure/atm
0		0.30
300		0.50

Calculate the rate constant.
(Given : log 2 = 0.301, log 3 = 0.4771, log 4 = 0.6021)

✓

Answer

$\text{k}=\frac{2.303}{\text{t}}\text { }\log\text{ }\frac{\text{p}_{\text{i}}}{2\text{p}_{\text{i}}-\text{p}_{\text{t}}}$
$=\frac{2.303}{300}\text{ }\log\text{ }\frac{0.3}{2\times0.3-0.5}$
$=\frac{2.303}{300}\text{ }\log\text{ }3$
$=\frac{2.303\times0.4771}{300}$
$= 0.0036\ atm^{-1}$ or $0.004\ atm^{-1}$ (approx.)

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "3 Marks Question" from Chemical Kinetics→Chemical Kinetics — all question types→Chemistry STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

The radius of an atom of an element is 75pm. If it crystallizes as a body-centred cubic lattice, what is the length of the side of the unit cell?

Indicate the steps in the preparation of:
$K_2Cr_2O_7$ from chromite ore.

The following data were obtained during the first order thermal decomposition of $SO_2Cl_2$ at a constant volume:
$SO_2Cl_2(g) \rightarrow SO_2(g) + Cl_2(g)$

Experiment	Time/s$^{–1}$	Total pressure/atm
$1$	$0$	$0.4$
$2$	$100$	$0.7$

Calculate the rate constant.
$($Given: $\log 4 = 0.6021, \log 2 = 0.3010).$

How would you differentiate between $S_N1$ and $S_N2$ mechanisms of substitution reactions? Give one example of each.

What is the effect of temperature on the rate constant of a reaction? How can this temperature effect on rate constant be represented quantitatively?

A solution of $KMnO_4$ on reduction yields either a colourless solution or a brown precipitate or a green solution depending on pH of the solution. What different stages of the reduction do these represent and how are they carried out?

Give reasons for the following:

Aniline does not undergo Friedal-Crafts reaction.
$(CH_3)_2\ NH$ is more basic than $(CH_3)_3\ N$ in an aqueous solution.
Primary amines have higher boiling point than tertiary amines.

In which of the following pairs will more electric current flow and why?
(a) KCl solution $25^{\circ} C$ and KCl solution at $50^{\circ} C$.
(b) $0.2 \quad M \quad CH _3 COOH$ solution and 2 M $CH _3 COOH$ solution.
(c) $NH _4 OH$ solution at $25^{\circ} C$ and at wire at $50^{\circ} C$.
(d) Al wire at $25^{\circ} C$ and Al wire at $50^{\circ} C$.

The reaction, $N_2 (g) + O_2 (g)$ $\rightleftharpoons 2NO(g)$ contributes to air pollution whenever a fuel is burnt in air at a high temperature. At $1500\ K,$ equilibrium constantKfor it is $1.0 \times 10^{–5}.$ Suppose in a case $[N_2] = 0.80\ mol\ L^{–1}$ and $[O_2] = 0.20\ mol\ L^{–1}$ before any reaction occurs. Calculate the equilibrium concentrations of the reactants and the product after the mixture has been heated to $1500\ K.$

The rate constant for the decomposition of ethyl iodide
$C_2H_5l(g) → C_2H_4(g)+Hl(g)$
at $600K$ is $1.60 \times 10^{-5} s^{-1}$. Its energy of activation is $209kJ/mol$. Calculate the rate constant of the reaction at $700K$.