Water contained in a beaker can be made to boil by passing steam through it
A. At atmospheric pressure
B. At a pressure greater than atmospheric pressure
C. Any pressure
D. Not possible
Answer: Option B
Solution(By Examveda Team)
The boiling point of a liquid is the temperature at which its vapor pressure is equal to the atmospheric pressure. When steam is passed through water, it heats the water, and if the pressure of the steam is greater than the atmospheric pressure, it can make the water boil even at a temperature below 100°C (the boiling point of water at atmospheric pressure).This phenomenon is utilized in various industrial processes, such as in steam generators and pressure cookers. When steam is supplied at a pressure higher than atmospheric pressure, the water in the beaker can be made to boil even at a temperature higher than 100°C.
Among the options provided, the correct answer is Option B: At a pressure greater than atmospheric pressure. This is because boiling at a pressure higher than atmospheric pressure allows the water to reach its boiling point at a temperature higher than 100°C.
Therefore, the correct answer is Option B: At a pressure greater than atmospheric pressure.
This Question Belongs to Mechanical Engineering >> Engineering Thermodynamics
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Comments ( 3 )
Addition of heat at constant pressure to a gas results in
A. Raising its temperature
B. Raising its pressure
C. Raising its volume
D. Raising its temperature and doing external work
Which of the following items is not a path function?
A. Heat
B. Work
C. Kinetic energy
D. Thermal conductivity
An actual engine is to be designed having same efficiency as the Carnot cycle. Such a proposition is
A. Feasible
B. Impossible
C. Possible
D. Possible, but with lot of sophistications
The absolute zero pressure can be attained at a temperature of
A. 0°C
B. -273°C
C. 273 K
D. None of these
Steam has higher amount of heat and at low pressure, water boils quickly because it attains equilibrium pressure in less time. Thus, the water in the beaker can be made boil by passing steam at a pressure lower than the atmospheric pressure.
As the pressure decreases the boiling points also decreases, that mean the water boil at lower temperature when surrounding pressure is low, that's why water boil at lower temperature at Everest(highest altitude, low pressure).
Wrong Answer. Because as the pressure decreases boiling point will also decrease, hence at lower temperature water will boil. Answer should be at pressure lower than atmospheric.