EASY
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Which one of the following relations are used to find saturated vapor pressure at room temperature?

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Important Questions on Calorimetry and Change of State

MEDIUM
Physics>Heat and Thermodynamics>Calorimetry and Change of State>Vapour Pressure and Phase Change
The temperature at which the vapour pressure of the liquid becomes equal to the atmospheric pressure is known as its ______.
EASY
Physics>Heat and Thermodynamics>Calorimetry and Change of State>Vapour Pressure and Phase Change
The boiling point of C6H6, CH3OH, C6H5NH2 and C6H5NO2 are 80°C, 65°C, 184°C and 212°C, respectively. Which one will show the highest vapour pressure at room temperature?
MEDIUM
Physics>Heat and Thermodynamics>Calorimetry and Change of State>Vapour Pressure and Phase Change
The compound with highest boiling point is 
EASY
Physics>Heat and Thermodynamics>Calorimetry and Change of State>Vapour Pressure and Phase Change
At higher altitudes, water boils at the temperature<100°C because
EASY
Physics>Heat and Thermodynamics>Calorimetry and Change of State>Vapour Pressure and Phase Change
Boiling point of water is defined as the temperature at which_______.   
MEDIUM
Physics>Heat and Thermodynamics>Calorimetry and Change of State>Vapour Pressure and Phase Change

Assertion (A): The boiling point of water decreases as the altitude increases. 

Reason (R): The atmospheric pressure increases with altitude.

EASY
Physics>Heat and Thermodynamics>Calorimetry and Change of State>Vapour Pressure and Phase Change
What is the triple point of water is
EASY
Physics>Heat and Thermodynamics>Calorimetry and Change of State>Vapour Pressure and Phase Change

Vapour that remains in contact with its liquid surface within a closed space is called _____.

(Choose from: saturated vapour/unsaturated vapour)

EASY
Physics>Heat and Thermodynamics>Calorimetry and Change of State>Vapour Pressure and Phase Change
The temperature at which the vapour pressure of a liquid equals the external pressure is called
EASY
Physics>Heat and Thermodynamics>Calorimetry and Change of State>Vapour Pressure and Phase Change
The best method for the separation of naphthalene and benzoic acid from their mixture is
EASY
Physics>Heat and Thermodynamics>Calorimetry and Change of State>Vapour Pressure and Phase Change
At higher altitudes, the boiling point of water lowers because:
MEDIUM
Physics>Heat and Thermodynamics>Calorimetry and Change of State>Vapour Pressure and Phase Change
Which of the following statement is CORRECT for the boiling point of solvent, containing a dissolved solid substance?
EASY
Physics>Heat and Thermodynamics>Calorimetry and Change of State>Vapour Pressure and Phase Change
In the phase diagram shown, the point Q corresponds to the triple point of water. The regions I, II, and III respectively corresponds to phases:
Question Image
EASY
Physics>Heat and Thermodynamics>Calorimetry and Change of State>Vapour Pressure and Phase Change
Pressure cooker reduces cooking time because
EASY
Physics>Heat and Thermodynamics>Calorimetry and Change of State>Vapour Pressure and Phase Change

The pair of boiling point and compound are given as,

Question Image

Which will show lowest vapour pressure at room temperature?

MEDIUM
Physics>Heat and Thermodynamics>Calorimetry and Change of State>Vapour Pressure and Phase Change
Normal boiling point TN is defined as the temperature when the vapour pressure of a liquid becomes equal to 1 atm and the standard boiling point TS is defined as the temperature at which the vapour pressure of a liquid becomes equal to 1 bar. Which one is not correct with regard to water?
MEDIUM
Physics>Heat and Thermodynamics>Calorimetry and Change of State>Vapour Pressure and Phase Change
A change in which a solid on heating directly changes into its vapour state is called _____.
EASY
Physics>Heat and Thermodynamics>Calorimetry and Change of State>Vapour Pressure and Phase Change
The process of boiling a liquid above its boiling point is called _____.
EASY
Physics>Heat and Thermodynamics>Calorimetry and Change of State>Vapour Pressure and Phase Change
Using the following information determine the boiling point of a mixture contains 1560 g benzene and 1125 g chlorobenzene, when the external pressure is 1000 torr. Assume the solution is ideal.
Given, Molar mass of benzene = 78

Molar mass of chlorobenzene = 112.5
 
Temperature
(0oC)		 Vapour pressure of benzene
(torr)		 Vapour pressure of chlorobenznee (torr)
      80              750               120
      90             1000               200
     100             1350               300
     110             1800               400
     120             2200               540
MEDIUM
Physics>Heat and Thermodynamics>Calorimetry and Change of State>Vapour Pressure and Phase Change
The boiling point of a solution of a non- volatile-solute is always_______.