हिंदी

What Mass of a Liquid a Ocific Heat Capaty 0.84 J K-1 and at a Temperatuust Be Mixed with 100 G of a Liquid B of Specific Heat Capacity 2.1 J G-1 K-1 and at 200c, So that Final Temperatu Becomes 320c? - Physics

Advertisements
Advertisements

प्रश्न

What mass of a liquid A of specific heat capacity 0.84 J K-1 and at a temperature 400C must be mixed with 100 g of a liquid B of specific heat capacity 2.1 J g-1 K-1 and at 200C, so that final temperature of mixture becomes 320C?
संख्यात्मक

उत्तर

Let m be the mass of liquid A.

Assuming that there is no heat loss,

Heat energy given by A = Heat energy taken by B

or, m x 0.84 x ( 40 - 32) = 100 x 2.1 x ( 32 - 20)

or, m = `(100 xx 2.1 xx 12)/(0.84 xx 8)` = 375 g

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 5: Heat - Exercise 5.1 ii [पृष्ठ २३४]

APPEARS IN

फ्रैंक Physics - Part 2 [English] Class 10 ICSE
अध्याय 5 Heat
Exercise 5.1 ii | Q 7 | पृष्ठ २३४

संबंधित प्रश्न

The specific heat capacity of a substance A is 3,800 Jkg `"^(–1)K^(–1)` and that of a substance B is 400 `"^(–1)K^(–1)`. Which of the two substances is a good conductor of heat ? Give a reason for your answer.


Write down a relationship to convert temperature on the Fahrenheit to Celsius scale.

The temperature of 600 g of cold water rises by 15°C when 300 g of hot water at 50°C is added to it. What was the initial temperature of the cold water?

Calculate the time taken by an immersion heater, which supplies energy at the rate of 7000 J/minute to raise temp. of 5 kg water from 22°C to 47°C.


Fill in the following blank using suitable word:

Evaporation causes ..........


Name two factors on which the heat energy librated by a body on cooling depends.


250 g of water at 30 °C is present in a copper vessel of mass 50 g. Calculate the mass of ice required to bring down the temperature of the vessel and its contents to 5 °C.
Specific latent heat of fusion of ice = 336 × 103 J kg-1
Specific heat capacity of copper vessel = 400 J kg-1 °C-1
Specific heat capacity of water = 4200 J kg-1 °C-1.


A heater supplies heat at the rate of 800 J/s. Find the time required to convert 50g of ice at -20°C into superheated steam at 140°C.

(Given: Specific heat of ice = 2.1 J/g, latent heat of ice = 340 J/gm, latent heat of steam = 2240 J/gm, specific heat of steam = 2.1 J/gm and specific heat of water = 4.2 J/gm.)


50 g of ice at 0°C is added to 300 g of a liquid at 30°C. What will be the final temperature of the mixture when all the ice has melted? The specific heat capacity of the liquid is 2.65 Jg-1 °C-1 while that of water is 4.2 J g-1 °C-1. Specific latent heat of fusion of ice = 336 Jg-1.


With the help of a neat diagram, explain the working of a calorimeter.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×