Chemistry-
General
Easy
Question
If the inversion temperature of a gas is -80°C, then it will produce cooling under Joule-Thomson effect at
- 298 K
- 273 K
- 193 K
- 173 K
The correct answer is: 273 K
Related Questions to study
chemistry-
For a perfectly crystalline solid 
, where a and 
are constant. If 
is 0.40 J/K mol at 10 K and 0.92 J/K mol at 20 K, then molary entropy at 20 K is :
For a perfectly crystalline solid , where a and are constant. If is 0.40 J/K mol at 10 K and 0.92 J/K mol at 20 K, then molary entropy at 20 K is :
chemistry-General
chemistry-
Two mole of an ideal gas is expanded irreversibly and isothermally at 37°C until its volume is doubled and 3.41 kJ heat is absorbed from surroundings. 
(system +surroundings) is
Two mole of an ideal gas is expanded irreversibly and isothermally at 37°C until its volume is doubled and 3.41 kJ heat is absorbed from surroundings. (system +surroundings) is
chemistry-General
chemistry-
One mole of an ideal monoatomic gas at 27°C is subjected to a reversible isoentropic compression until final temperature reached to 327°C If the initial pressure was 
atm then find the value of In 
One mole of an ideal monoatomic gas at 27°C is subjected to a reversible isoentropic compression until final temperature reached to 327°C If the initial pressure was atm then find the value of In
chemistry-General
chemistry-
Calculate ΔS for 3 mole of a diatomic ideal gas which is heated and compressed from 298 K and 1 bar to 596 K and 4 bar.
Calculate ΔS for 3 mole of a diatomic ideal gas which is heated and compressed from 298 K and 1 bar to 596 K and 4 bar.
chemistry-General
chemistry-
Considering entropy(s) at a thermo dynamic parameter, the criterion for the spontanity of any process is
Considering entropy(s) at a thermo dynamic parameter, the criterion for the spontanity of any process is
chemistry-General
chemistry-
When a liquid evaporates, which is true about the signs of the enthalpy and entropy changes ?
When a liquid evaporates, which is true about the signs of the enthalpy and entropy changes ?
chemistry-General
chemistry-
When charcoal burns in air signs of ΔH and ΔS are 
When charcoal burns in air signs of ΔH and ΔS are
chemistry-General
chemistry-
What are the signs of the entropy change (+ or - ) in the following:
I) A liquid crystallises into a solid
II) Temperature of a crystalline solid is raised from 0 K to 115 K
III) 
IV) 
What are the signs of the entropy change (+ or - ) in the following:
I) A liquid crystallises into a solid
II) Temperature of a crystalline solid is raised from 0 K to 115 K
III)
IV)
chemistry-General
chemistry-
Which has maximum entropy change of vaporisation ?
Which has maximum entropy change of vaporisation ?
chemistry-General
chemistry-
The molar heat capacities at constant pressure (assumed constant with respect to temperature) at A, B and C are in ratio of 3:1.5:2.0. The enthalpy change for the exothermic reaction 
at 300 K and 310 K is 
and 
respectively then :
The molar heat capacities at constant pressure (assumed constant with respect to temperature) at A, B and C are in ratio of 3:1.5:2.0. The enthalpy change for the exothermic reaction at 300 K and 310 K is and respectively then :
chemistry-General
chemistry-
Number of phases present in the following thermodynamic systems are:
1) 
2) 
3) 
Number of phases present in the following thermodynamic systems are:
1)
2)
3)
chemistry-General
maths-
For the circuits shown below, the Boolean polynomial is
For the circuits shown below, the Boolean polynomial is
maths-General
maths-
Let B={p, q, r, .....} and let two binary operations be denoted by ‘
' and ‘
’ or ‘+’ or ‘.’, then
Let B={p, q, r, .....} and let two binary operations be denoted by ‘' and ‘’ or ‘+’ or ‘.’, then
maths-General
maths-
Let B={p, q, r, .....} and let two binary operations be denoted by ‘' and ‘’ or ‘+’ or ‘.’, then
Let B={p, q, r, .....} and let two binary operations be denoted by ‘' and ‘’ or ‘+’ or ‘.’, then
maths-General
maths-
Let B={p, q, r, .....} and let two binary operations be denoted by ‘' and ‘’ or ‘+’ or ‘.’, then
Let B={p, q, r, .....} and let two binary operations be denoted by ‘' and ‘’ or ‘+’ or ‘.’, then
maths-General
