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yaroslaw [1]
3 years ago
12

Water (2110 g ) is heated until it just begins to boil. if the water absorbs 551000. j of heat in the process, what was the init

ial temperature of the water?
Chemistry
1 answer:
Sunny_sXe [5.5K]3 years ago
8 0
Answer:
42.9
∘
C
Explanation:
The idea here is that the problem is providing you with the amount of heat needed to raise the temperature of a given sample of water from an initial temperature to its boiling point, i.e. to 100
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A grapefruit has a weight on earth of 4.9 newtons. what is grapefruit's mass?
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How much energy in kilojoules is released when 23.4 g of ethanol vapor at 83.0 ∘C is cooled to -15.0 ∘C ?
slamgirl [31]

Answer : The amount of in kilojoules released is, -5.53 kJ

Explanation :

Formula used :

q=m\times c\times (T_{final}-T_{initial})

where,

q = heat released = ?

c = specific heat of ethanol = 2.41J/g^oC

m = mass of ethanol = 23.4 g

T_{final} = final temperature = -15.0^oC

T_{initial} = initial temperature = 83.0^oC

Now put all the given values in the above formula, we get:

q=23.4g\times 2.41J/g^oC\times (-15.0-83.0)^oC

q=-5526.612J=-5.53\times 10^3J=-5.53kJ

Therefore, the amount of in kilojoules released is, -5.53 kJ

5 0
4 years ago
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