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11.6 Discussion: Heat fo Phase Change

Authored by Lan Vu

Chemistry

9th - 12th Grade

Used 2+ times

11.6 Discussion: Heat fo Phase Change
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5 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Latent heat is

the heat absorbed or released at a boiling process during a change of phase

the heat absorbed or released at a constant temperature during a change of phase

the heat absorbed or released at a constant temperature during a change of phase of 1 kg object

the heat absorbed or released by an object to increase or decrease its temperature by 1 degree Celcius

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

The graph shows the cooling curve of a substance. At which stages the specific latent heat released?

AB and CD

BC and DE

AB and EF

BC and CD

3.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Calculate the energy absorbed by 30 g of 100 ⁰C water that is turned into 100 ⁰C.

67 800 J

6 7800 J

678 J

67.8 J

4.

MATH RESPONSE QUESTION

2 mins • 1 pt

Mathematical Equivalence

ON

5.

MATH RESPONSE QUESTION

2 mins • 1 pt

How much heat is needed to heat 10g of water from -2oC to 104oC in kJ?

ΔHfus= 6.02 kJ/mol

ΔHvap= 40.65 kJ/mol

cwater= 4.184 J/goC

csteam= 2.02 J/goC

Mathematical Equivalence

ON

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