मराठी

State, with Reason, Which of the Two, Boiling Water Or Steam Both at 100oc Will Produce More Severe Burns. - Physics

Advertisements
Advertisements

प्रश्न

State, with reason, which of the two, boiling water or steam both at 100°C will produce more severe burns.

एका वाक्यात उत्तर
Advertisements

उत्तर

Steam at 100°C will produce more severe burns because every gram of steam gives out 2260 J of heat energy while condensing. This much amount of heat is additional to the heat contained in one gram of boiling water.

 
shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 5: Heat - Exercise 4 [पृष्ठ २४८]

APPEARS IN

फ्रँक Physics - Part 2 [English] Class 10 ICSE
पाठ 5 Heat
Exercise 4 | Q 1 | पृष्ठ २४८

संबंधित प्रश्‍न

A child running a temperature of 101°F is given an antipyrin (i.e. a medicine that lowers fever) which causes an increase in the rate of evaporation of sweat from his body. If the fever is brought down to 98 °F in 20 min, what is the average rate of extra evaporation caused, by the drug? Assume the evaporation mechanism to be the only way by which heat is lost. The mass of the child is 30 kg. The specific heat of human body is approximately the same as that of water, and latent heat of evaporation of water at that temperature is about 580 cal g–1.


How much heat energy is released when 5.0 g of water at 20℃ changes into ice at 0℃? Take specific heat capacity of water = 4.2 J g-1 K-1, Specific latent heat of fusion of ice = 336 J g-1.


Name two green house gases ?


What impact will climate changes have on the crops of food?


If 10125 J of heat energy boils off 4.5 g of water at 100°C  to steam at 100°C, find the specific latent heat of steam.


Derive an expression for finding out the specific heat capacity of a body (solid) from the readings of an experiment given below:

(i) Mass of empty calorimeter (with stirrer) = m1 gm

(ii) Mass of the metal piece = M gm

(iii) Mass of colorimeter and water = m2 gm

(iv) Initial temperature and water = t1°C

(v) Temperature of hot solid (metal piece) = t2 °C

(vi) Final temperature of the mixture = t°C

(vii) Specific heat of calorimeter = 0.4 J gm / °C


Consider the statement given below and choose the correct option.

Assertion: Radiation is a form of heat transfer which takes place only in vacuum.

Reason: The thermal energy is transferred from one part of a substance to another part without the actual movement of the atoms or molecules.


Numerical Problem.

What is the heat in joules required to raise the temperature of 25 grams of water from 0°C to 100°C? What is the heat in Calories? (Specific heat of water = `(4.18"J")/("g"°"C")`


Two metals A and B have specific heat capacities in the ratio 2:3. If they are supplied same amount of heat then

If specific heat capacity of metal A is 0.26 Jg-1 0C-1 then calculate the specific heat capacity of metal B.


J/Kg °C is the unit of specific heat capacity.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×