You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard XII

Chemistry

Internal Energy

The heat chan...

Question

The heat change associated with reactions at constant volume is due to the difference in which property of the reactants and the products ?

internal energy

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

enthalpy

No worries! We‘ve got your back. Try BYJU‘S free classes today!

heat capacity

No worries! We‘ve got your back. Try BYJU‘S free classes today!

free energy

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C internal energy
First Law of Thermodynamics dictates that $Δ Q = Δ U + Δ W$
At constant V, $Δ W = 0$
So, $Δ Q = Δ U$
So at constant volume, heat change takes place due to change in internal energy of the system

Suggest Corrections

Similar questions

The difference between the heat of reaction at constant pressure and the heat of reaction at constant volume for the reaction, $2 C_{6} H_{6 (l)} + 15 O_{2 (g)} \to 12 C O_{2 (g)} + 6 H_{2} O_{(l)}$ at $25^{o} C$ in $k J$ is:

Q. For the reaction

\frac{1}{8} S_{8 (s)} + \frac{3}{2} O_{2 (g)} \to {S O}_{3 (g)}

, the difference of heat change at constant pressure and constant volume at

27^{0} C

will be:

Chemical reaction is invariably associated with the transfer of energy either in the form of heat or light. In the laboratory, heat changes in physical and chemical processes are measured with an instrument called Calorimeter. Heat change in the process is calculated as :

q = m s Δ T

........

s = s p e c i f i c h e a t

= c Δ T

.......

c = h e a t c a p a c i t y

Heat of reaction at constant volume is measured using bomb Calorimeter.

q_{V} = Δ U =

internal energy change
Heat of reaction at constant pressure is measured using bomb Calorimeter.

q_{P} = Δ H

q_{P} = q_{V} + P Δ V

Δ H = Δ U + Δ n R T

The heat capacity of a bomb calorimeter is

500 J K^{- 1}

. When

0.1 g

of Methane was burnt in this calorimeter, the temperature rose by

2^{\circ} C

. The value of

Δ U

per mole will be :

Q. The specific heat of air at constant volume is 0.172 Cal

g^{- 1}

C^{- 1}

. The change in internal energy when 5g of air is heated from 0C to 4C at constant volume is:

Q. Chemical reactions are invariably associated with the transfer of energy either in the form of heat or light. In the laboratory,
heat changes in physical and chemical processes are measured with an instrument called Calorimeter. Heat change
in the process is calculated as

q = m s Δ T

........

s = s p e c i f i c h e a t

= c Δ T

.......

c = h e a t c a p a c i t y

Heat of reaction at constant volume is measured using bomb Calorimeter.

q_{V} = Δ U = i n t e r n a l e n e r g y c h a n g e

Heat of reaction at constant pressure is measured using bomb Calorimeter.

q_{P} = Δ H

q_{P} = q_{V} + P Δ V

Δ H = Δ U + Δ n R T

The enthalpy of fusion of ice is

6.02 k J m o l^{- 1}

. The heat capacity of water is

4.18 J g^{- 1} C^{- 1}

What is the smallest number of ice cubes at

0^{\circ} C

, each containing one mole of water, that is needed to cool

500 g

of liquid water from

20^{\circ} C

0^{\circ} C

Join BYJU'S Learning Program

The heat change associated with reactions at constant volume is due to the difference in which property of the reactants and the products ?

The correct option is C internal energyFirst Law of Thermodynamics dictates that ΔQ=ΔU+ΔWAt constant V, ΔW=0So, ΔQ=ΔUSo at constant volume, heat change takes place due to change in internal energy of the system

The correct option is C internal energy
First Law of Thermodynamics dictates that $Δ Q = Δ U + Δ W$
At constant V, $Δ W = 0$
So, $Δ Q = Δ U$
So at constant volume, heat change takes place due to change in internal energy of the system