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lana [24]
2 years ago
6

500 gram sample of an unknown metal releases 640 Joules as it cools from 55.0 oC to 250 oC. What is the specific heat of the sam

ple?
Chemistry
1 answer:
marshall27 [118]2 years ago
4 0

Answer:

c = 0.043 j/ g. °C

Explanation:

Given data:

Amount of sample = 500 g

Initial temperature = 55.0°C

Final temperature = 25.0°C

Heat required released = 640 J

Specific heat capacity of sample = ?

Solution:

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = 25°C - 55°C

ΔT = -30°C

by putting values,

-640 J = 500 g × c × -30 °C

c  = 640 J / 500 g× 30 °C

c = 640 J /15000 g. °C

c = 0.043 j/ g. °C

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5-chloro-2-methylcyclohexanol    

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Since the other options involve: <u>high countings for the susbtituents groups  (</u><u>3</u><u>-chloro-</u><u>6</u><u>-methylcyclohexanol)</u>, <u>wrong assignation of priority functional group (</u><u>1-chloro</u><u>-4-methylcyclohexanol), wrong sequence of counting in the compound (</u><u>2-methyl-3-chloro</u><u>cyclohexanol) and no alphabetical order to name the compound (2-</u><u>methyl</u><u>-5-</u><u>chloro</u><u>cyclohexanol), </u><u>the correct option is:</u>            

5-chloro-2-methylcyclohexanol  

Have a nice day!

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