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1 vote
How much heat is required to change 100 g of ice (H2O) at 253 K to vapor (steam) at 393 K?

User Simpanoz
by
7.9k points

2 Answers

2 votes

Answer:

309 kJ

Step-by-step explanation:

User Tovmeod
by
8.6k points
3 votes

Answer: The heat required will be 58.604 kJ.

Explanation:

To calculate the amount of heat required, we use the formula:


Q= m* c* \Delta T

Q= heat gained or absorbed = ? J

m = mass of the substance = 100 g

c = heat capacity of water = 4.186 J/g ° C

Putting values in above equation, we get:


\Delta T={\text{Change in temperature}}=(393-253)K=140K=140^oC


Q=100g* 4.186J/g^oC* 140^oC

Q = 58604 Joules = 58.604 kJ (Conversion factor: 1 kJ = 1000J)

Thus, heat released by 100 grams of ice is 58.604kJ.

User Chelle
by
7.1k points
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