250 Gm Of Water And Equal Volume Of Alcohol Of Mass 200 Gm Are Replaced Successively In The Same Calorimeter And Cool From 60oC To 55oC In 130 Seconds And 67 Seconds Respectively. If The Water Equivalent Of The Calorimeter Is 10 Gm, Then The Specific Heat Of Alcohol In Cal/gm-oC is:   

Why Kaysons ?

Video lectures

Access over 500+ hours of video lectures 24*7, covering complete syllabus for JEE preparation.

Online Support

Practice over 30000+ questions starting from basic level to JEE advance level.

Live Doubt Clearing Session

Ask your doubts live everyday Join our live doubt clearing session conducted by our experts.

National Mock Tests

Give tests to analyze your progress and evaluate where you stand in terms of your JEE preparation.

Organized Learning

Proper planning to complete syllabus is the key to get a decent rank in JEE.

Test Series/Daily assignments

Give tests to analyze your progress and evaluate where you stand in terms of your JEE preparation.

SPEAK TO COUNSELLOR ? CLICK HERE

Question

250 gm of water and equal volume of alcohol of mass 200 gm are replaced successively in the same calorimeter and cool from 60oC to 55oC in 130 seconds and 67 seconds respectively. If the water equivalent of the calorimeter is 10 gm, then the specific heat of alcohol in cal/gm-oC is:   

Solution

Correct option is

0.62

 

Mass of water = 250 gm   

Mass of alcohol = 200 gm   

Water equivalent of calorimeter, W = 10 gm   

Fall of temperature = 60 – 55 = 5oC   

Time taken by water to cool = 130 sec.

Time taken by alcohol to cool = 67 sec.   

Heat lost by water and colorimeter   

              

  

Heat lost by alcohol and calorimeter = (200s + 10)5

  

Rates of loss of heat in the two cases are equal   

 cal/gm-oC

Testing

SIMILAR QUESTIONS

Q1

In a resistance thermometer the resistances at 0oC and 100oC are 6.74 and 7.74 ohm respectively. The temperature corresponding to 6.53 ohm resistance is:   

Q2

Which of the following has the highest specific heat? 

Q3

Which of the following has the highest specific heat? 

Q4

A liquid is being converted into vapours at its bp; the specific heat of liquid at this temperature will be:

Q5

Specific heat of a gas undergoing adiabatic change is:

Q6

Which of the following produces more servere burns? 

Q7

A body cools from 91oC to 89oC in 5 minutes when the room temperature is 20oC. Then it will cool from 71oC to 69oC in:   

Q8

Three liquids with masses m1m2m3 are thoroughly mixed. If their specific heats are s1s2s3 and their temperature θ1θ2θ3 respectively, then the temperature of the mixture is:    

Q9

80 gm of water at 30oC is poured on a large block of ice at 0oC. The mass of ice that melts is:

Q10

The sprinkling of water reduce the temperature of a closed room because: