MyQuestionIcon

1

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

Zeroth Law of Thermodynamics

When a hot li...

Question

When a hot liquid is mixed with a cold liquid, the temperature of the mixture

A

first decreases and then becomes constant

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

B

first increases and then becomes constant

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

C

continuosly increases

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

D

is undefined for some time and then becomes nearly constant

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

Open in App

Solution

The correct option is D is undefined for some time and then becomes nearly constant
Initially when the two liquids are mixed the temperature is undefined because there is heat exchange between the liquids . There exists a transient phase after which it will reach an equilibrium . This equilibrium temperature can be found by conserving energy .

Suggest Corrections

thumbs-up

0

Similar questions

Q. When a hot liquid is mixed with a cold liquid, the temperature of the mixture

(a) first decreases then becomes constant
(b) first increases then becomes constant
(c) continuously increases
(d) is undefined for some time and then becomes nearly constant

Q. A student takes some water in a beaker and heats it over a flame for determining its boiling point. He keeps on taking its temperature readings. He would observe that the temperature of water :
(1) keeps on increasing regularly
(2) keeps on increasing irregularly
(3) first increases slowly, then decreases rapidly and eventually becomes constant
(4) first increases gradually and then becomes constant.

Q. Assertion : Current is passed through a metallic wire, heating it red. When cold water is poured on half of it, the rest becomes more hot.
Reason : Resistance decreases due to the decrease in temperature and then current through wire increases.

Q. When an air bubble moves up from the bottom of a lake
a) velocity decreases and becomes zero
b) acceleration increases and becomes zero
c) velocity increases and becomes constant
d) acceleration decreases and becomes zero

Q. A Carnots engine, with its cold body at

17^{o} C

50

efficiency. If the temperature of its hot body is now increased by

145^{o} C

, then efficiency becomes

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

PHYSICS

Watch in App

explore_more_icon

Explore more

Zeroth Law of Thermodynamics

Standard XII Physics

Join BYJU'S Learning Program

CrossIcon