Prof. Anil Thomas and Prof. Santosh Yadav Solutions for Chapter: Chemical Thermodynamics and Energetics, Exercise 2: Critical Thinking

A reaction that takes place with the absorption of energy is

When water is added to quick lime, the reaction is ______.

Mark the incorrect relationship from the following.

The table given below lists the bond dissociation energy (${\mathrm{E}}_{\mathrm{diss}}$) for single covalent bonds formed between $\mathrm{C} \text{and atoms} \mathrm{A}, \mathrm{B}, \mathrm{D}, \mathrm{E}.$

Which of the following atoms has the smallest size?

A gas present in a cylinder fitted with a frictionless piston expands against a constant pressure of $1 \mathrm{atm}$from a volume of $2 \mathrm{L}$ to a volume of $6 \mathrm{L}$. In doing so, it absorbs $800 \mathrm{J}$ here from surroundings. Increase in the internal energy of process is_______.

At $302 \mathrm{K}$, one mole of an ideal gas is compressed isothermally and reversibly from a pressure of $2 \mathrm{atm} \text{to} 10 \mathrm{atm}.$ The values of $\text{∆U}$ and $\mathrm{q}$, respectively will be _____.

An athlete is given glucose of energy equivalent to$880 \mathrm{kJ}$. He utilises $50 \%$ of this gained energy in the event, in order to avoid storage of energy in the body. The weight of water he would need to perspire is_____. (Enthalpy of evaporation of water is $44 \mathrm{kJ} {\mathrm{mol}}^{-1}$)

$50 \mathrm{mL}$ of water takes $5 \mathrm{minutes}$to evaporate from a vessel on a heater connected to an electric source which delivers $400 \mathrm{W}.$ The enthalpy of vaporization of water is ______.