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How many joules of heat are absorbed whe...

How many joules of heat are absorbed when 70.0 g of water is completely vaporised at its boiling point?

A

23352 J

B

7000 J

C

15813 J

D

158200 J

Text Solution

Verified by Experts

The correct Answer is:
D
Since, the process involves phase change, heat absorbed, Q=mass`xx`latent heat of vaporisation
Given mass=70.0g=0.07 kg, `L_(V)=2260kJ//kg`
`therefore Q=0.07xx2260kJ=158.2kJ=158200J`
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-CHEMICAL THERMODYNAMICS AND ENERGETIC-Exercise 1
  1. An ideal gas expands from 10^(-3) m^(3) to 10^(-2) m^(3) at 300 K agai...

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  2. For an ideal gas, pressure (p) and interal energy (E ) per unit volume...

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  3. How many joules of heat are absorbed when 70.0 g of water is completel...

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  4. Change in internal energy when 4 kJ of work is done on the system and ...

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  5. A system absorb 600 J of heat and work equivalent to 300 J on its surr...

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  6. Select the correct formula about the change in enthalpy.

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  7. Select the correct formula for Delta(sol)H^(-).

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  8. Which of the following statement is correct regarding melting of ice?

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  9. Which of the following is not an endothermic reaction?

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  10. Given : S((s))+(3)/(2)O(2(g))rarrSO(3(g)+2X Kcal SO(2(s))+(1)/(2)O(2...

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  11. In the given reaction, Na(s)toNa(g) The enthalpy of atomisation is s...

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  12. In the following process, H(2)(g) to 2H(g), " "Delta(H-H)H^(ө)=43...

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  13. Enthalpy of solution of NaOH (solid) in water is -41.6 kJ mol^(-1). Wh...

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  14. DeltaU^(@) for combustion of methane is -X kJ mol^(-1). The value of D...

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  15. Two moles of an ideal gas is expanded isothermally and reversibly from...

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  16. For the given reaction, CH(4)(g)+2O(2)(g)toCO(2)(g)+2H(2)O(l) Sele...

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  17. What is Deltan(g) for the combusion of 1 mole of benzene, when both re...

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  18. Enthalpy change for the reaction, 4H(g)to2H(2)(g) is -869.5 kJ. Th...

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  19. The heat energy required to ionise the following molecules is given as...

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  20. Given that DeltaH(f)(H)=218kJ//mol, express the H-H bond energy in kca...

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