1. Tardigrade
  2. Question
  3. Chemistry
  4. The standard electrode potential E ominus and its temeprature coefficient ((dE ominus/dT)) for a cell are 2V and -5 × 10-4 VK-1 at 300 K respectively. The cell reaction is Zn(s) + Cu2+ (aq) → Zn2+ (aq) + Cu(s) The standard reaction enthalpy (Δr H ominus) at 300 K in kJ mol-1 is; [Use R = 8jK-1 mol-1 and F = 96,000 C mol-1]

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. The standard electrode potential $E^{\ominus}$ and its temeprature coefficient $\left(\frac{dE^{\ominus}}{dT}\right)$ for a cell are 2V and $-5 \times 10^{-4} \; VK^{-1}$ at 300 K respectively. The cell reaction is
$\ce{Zn(s) + Cu^{2+} (aq) \to Zn^{2+} (aq) + Cu(s)}$
The standard reaction enthalpy $(\Delta_r H^{\ominus}) $ at 300 K in kJ $mol^{-1}$ is;
[Use $R = 8jK^{-1} \; mol^{-1}$ and $F = 96,000\, C$ $mol^{-1}$]

JEE MainJEE Main 2019Electrochemistry

Solution:

Chiefly $NO_2 , O_3$ and hydrocarbon are responsible for build up smog.