Question
What is thermochemistry ? Explain.
✓
Answer
Thermochemistry : Thermodynamic study of heat changes or enthalpy changes during the chemical reactions is called thermochemistry.
Consider a reaction, Reactants → Products
The heat changes ΔH for the reaction may be represented as,
$\Delta H_{\text {reaction }}=\Sigma H_{\text {products }}-\Sigma H_{\text {reactants }}$
where H represents enthalpy.
The energy released or absorbed during a chemical change appears in the form of heat energy.
Consider a reaction, Reactants → Products
The heat changes ΔH for the reaction may be represented as,
$\Delta H_{\text {reaction }}=\Sigma H_{\text {products }}-\Sigma H_{\text {reactants }}$
where H represents enthalpy.
The energy released or absorbed during a chemical change appears in the form of heat energy.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Draw a neat diagram for enzyme catalysis.
Gold crystallises into face-centred cubic cells. The edge length of unit cell is $4.08 \times 10^{-8} \ cm$. Calculate the density of gold.
[Molar mass of gold $=197 gmol^{-1}]$
→[Molar mass of gold $=197 gmol^{-1}]$
How is phenol obtained from arene diazonium salt?
What are the uses of ozone?
In the electrolysis of $AgNO_3$ solution $0.7 g$ of $Ag$ is deposited after a certain period of time.
Calculate the quantity of electricity required in coloumb.$[$Molar mass of $Ag$ is $107.9 \ g \ mol^{-1}]$
→Calculate the quantity of electricity required in coloumb.$[$Molar mass of $Ag$ is $107.9 \ g \ mol^{-1}]$
How many moles of electrons are required for reduction of 2 moles of $Zn ^{2+}$ to Zn ?
→A buffer solution contains $0.3 M NH _4 OH$ and $0.4 M NH _4 Cl$. If $K _{ b }$ for $NH _4 OH$ is $1.8 \times 10^{-5}$, calculate $pH$ of the solution.
→Calculate the internal energy at $298 K$ for the formation of one mole of ammonia, if the enthalpy change at constant pressure is $-42.0 kJ mol ^{-1}$.
(Given : $R =8.314 J K ^{-1} mol ^{-1}$ )
→0.1 mole of Buckminster fullerene of molar mass $720 gmol ^{-1}$ contains how many $Kg$ of carbon ?
→