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ioda
3 years ago
15

A sample of an unknown substance has a mass of 0.158 kg. If 2,510.0 J of heat is required to heat the substance from 32.0°C to 6

1.0°C, what is the specific heat of the substance?
Chemistry
2 answers:
JulijaS [17]3 years ago
8 0
Specific heat is the amount of heat absorb or released by a substance to change the temperature to one degree Celsius. To determine the specific heat, we use the expression for the heat absorbed by the system. Heat gained or absorbed in a system can be calculated by multiplying the given mass to the specific heat capacity of the substance and the temperature difference. It is expressed as follows:
Heat = mC(T2-T1)
By substituting the given values, we can calculate for C which is the specific heat of the material.
2510 J = .158 kg ( 1000 g / 1 kg) (C) ( 61.0 - 32.0 °C)C = 0.5478 J / g °C
andreyandreev [35.5K]3 years ago
6 0

<u>Given:</u>

Mass of the unknown substance, m = 0.158 kg = 158 g

Heat absorbed Q = 2510.0 J

Initial temperature T1 = 32 C

Final temperature T2 = 61 C

<u>To determine:</u>

The specific heat of the substance

<u>Explanation:</u>

The heat absorbed to raise the temperature from T1 to T2 is-

Q = mcΔT

where c = specific heat

c = Q/mΔT = Q/m(T2-T1)

c = 2510 J/158 g * (61-32) C = 0.548 J/gC

Ans: Specific of the substance is 0.548 J/gC

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Reduction occurs at which electrode?
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The electrode that removes ions from solution

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8 0
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5 0
4 years ago
Read 2 more answers
C12H26O + SO3+NaOH ----&gt; C12H25NaSO4+ H2O
Vlad [161]

Answer:

We can solve this by the method of which i solved your one question earlier

so again here molar mass of C12H25NaSO4 is 288.372 and number of moles for 11900 gm of C12H25NaSO4 will be = 11900/288.372

which is almost = 41.26 moles

so to get one mole of C12H25NaSO4 we need one mole of C12H26O

so for 41.26 moles of C12H25NaSO4 it will require 41 26 moles of C12H26O

so the mass of C12H26O = 41.26× its molar mass

C12H26O = 41.26×186.34

= 7688.38 gm!!

so the conclusion is If you need 11900 g of C12H25NaSO4 (Sodium Lauryl Sulfate) you need C12H26O 7688.38 gm !!

Again i d k wether it's right or wrong but i tried my best hope it helped you!!

4 0
3 years ago
Alcl3+Na =NaCl+ Al .did Al change oxidation number
saul85 [17]

Answer:

yes it is ( From +3 to 0 )

Explanation:

If this is the balanced equation:

AlCl3     +    3Na ——>    3NaCl      +      Al

Al      Cl        3Na             Na     Cl            Al

+3     -3        0                    +1       -1            0

5 0
4 years ago
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