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poizon [28]
3 years ago
11

245 g water sample initially at at 32 oC absorbs 17 kcal of heat. What is the final temperature of water?

Chemistry
1 answer:
steposvetlana [31]3 years ago
4 0

Answer:62.66°C or 235.66K

Explanation:Q=McpT, the energy was given in calories so you first convert to Joules by multiplying the value in calories by 4.184J.

17*4.184=71.128kJ.

71.128kJ=mcpT

71.128kJ=245*4.187*(T-Tm)

Tm is the final temperature of the mixture. The T is the temperature given which should be converted to Kelvin by adding 273...T=32+273=305K.

71128J=245*4.187*(305-Tm)

71128=312873.575-1025.815Tm

1025.815Tm=312873.575-71128

1025.815Tm=241745.58

Tm=241745.58/1025.815

Tm=235.66K

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In substitution reactions, (CH3)3C-I reacts at the same rate with Br- and Cl- even though Br- is a more reactive nucleophile tha
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A. (CH3)3C-I reacts by SN1 mechanism whose rate is independent of nucleophile reactivity.

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How do scientists classify intrusive igneous features? according to shape, texture, and their distance from the nearest volcanic
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according to shape, size, and their relationship to surrounding layers of rock

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What is the molarity of the bleach solution of slide 28 (7.4% NaOCl by mass, density 1.12 g.cm-3)?
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Molarity of solution is 1.10x10⁻³ M

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Solute NaOCl

7.4% by mass means, that in 100 grams of solution, we have 7.4 g of solute.

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3 0
3 years ago
Read 2 more answers
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