Home
Class 11
PHYSICS
A sample of 0.1 g of water at 100^(@)C a...

A sample of 0.1 g of water at `100^(@)C` and normal pressure `(1.013 xx 10^(5) N cdot m^(-2))` requires 54 cal of heat energy to convert to steam at `100^(@)C`. If the volume of the steam produced is `167.1` cc, the change in internal energy of the sample is

A

42.2 J

B

208. 7 J

C

104.3 J

D

84.5 J

Text Solution

Verified by Experts

The correct Answer is:
B
Initial volume = `(0.1)/(1) = 0.1 cm^(3)`
Final volume = `167.1 cm^(3)`
`Delta Q = Delta U + Delta W or, Delta Q = Delta U + p Delta V`
or, `54 xx 4.2 = Delta U + 1.013 xx 10^(5) xx (167.1 - 0.1) xx 10^(-6)`
or, `Delta U = 208.78 J`.
Promotional Banner

Topper's Solved these Questions

  • FIRST AND SECOND LAW OF THERMODYNAMICS

    CHHAYA PUBLICATION|Exercise CBSE SCANNER|18 Videos

  • FIRST AND SECOND LAW OF THERMODYNAMICS

    CHHAYA PUBLICATION|Exercise Examination Archive with solution (AIPMT)|6 Videos

  • EXPANSION OF SOLIDS AND LIQUIDS

    CHHAYA PUBLICATION|Exercise CBSE SCANNER|2 Videos

  • FRICTION

    CHHAYA PUBLICATION|Exercise CBSE SCANNER|7 Videos

Similar Questions

Explore conceptually related problems

How much water at 1^@C can be converted to steam by 1 Cal heat ?

1 gm of water ( =1 cm^(3)) when boiled at 1 atmosphere pressure, requires 169 J of energy to get converted into steam. Which of the following gives the volume of the converted steam if latent heat of vaporization of water is 540 cal/gm?

A sample of ideal gas (gamma = 1.4) is heated at constant pressure. If an amount of 140 J of heat is supplied to the gas, find change in internal energy of the gas.

The molar specific heat of an ideal gas at constant pressure is C_(p) = 5/2 R . Some amount of this gas in a closed container has a volume 0.0083 m^(3) , a temperature 300 K and a pressure 1.6 xx 10^(6) N cdot m^(-2) . If 2.49 xx 10^(4) J 1 of heat is supplied at a constant volume of the gas, find out the final temperature and pressure. Given, R = 8.3 J cdot mol^(-1) cdot K^(-1) .

10^(18) electrons hit a target per second in a X-ray tube with a velocity of 2 xx 10^(6) m cdot s^(-1) . The mass of the metallic piece of the target is 200 g, specific heat is 0.12 cal cdot g^(-1) cdot^(@)C^(-1) and mass of an electron is 9.1 xx 10^(-28) g . If 98% of the energy is converted into heat, how much time will be required to increase the temperature of the metallic piece of the target by 50^(@)C ?