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3 years ago

A 2kg metal cylinder is supplied with 1600J of energy to heat it from 5C to 13C. What is the SHC of the metal?

Chemistry

1 answer:

gtnhenbr [62]3 years ago

3 0

Answer:

100Jkg/°C

Explanation:

Given parameters:

Mass of metal = 2kg

Amount of heat energy = 1600J

Initial temperature = 5°C

Final temperature = 13°C

Unknown:

Specific heat capacity of the metal = ?

Solution:

Specific heat capacity of a body is the amount of heat needed to raise the temperature of unit mass of a body by 1°C.

H = m x C x (T₂ - T₁ )

H is the amount of heat

m is the mass

C is the unknown specific heat capacity

T is the temperature

Insert the parameters and solve;

1600 = 2 x C x (13 - 5)

1600 = 16C

C = 100Jkg/°C

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Explanation:

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To formulate the empirical formula, we need to follow some steps:

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Step 2: Calculating the mole ratio of the given elements.

For the mole ratio, we divide each value of the moles by the smallest number of moles calculated which is 0.5 moles.

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3 years ago

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3 years ago

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Answer:

$\boxed{3}$

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where

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Calculation:

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3 years ago

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Answer:

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Theoretical yield: 2.29 g BaS

Percent yield: 87%

Explanation:

The corrected balanced reaction equation is:

K₂S + Ba(NO₃)₂ ⇒ 2KNO₃ + BaS

The amount of potassium sulfide added is:

(25.0 mL)(1.20mol/L) = 30 mmol

The amount of barium nitrate added is:

(15.0mL)(0.900mol/L = 13.5 mmol

Since the reactant react in a 1:1 molar ratio, barium nitrate is the limiting reagent. If all of the limiting reagent reacts, the amount of barium sulfide produced is:

(13.5 mmol Ba(NO₃)₂)(BaS/Ba(NO₃)₂ ) = 13.5 mmol BaS

Converting this amount to grams gives the theoretical yield of BaS (molar mass 169.39 g/mol).

(13.5 mmol)(169.39 g/mol)(1g/1000mg) = 2.29 g BaS

The percent yield is calculated as follows:

(actual yield) / (theoretical yield) x 100%

(2.0 g) / (2.29 g) x 100% = 87%

6 0

3 years ago

A 2kg metal cylinder is supplied with 1600J of energy to heat it from 5*C to 13*C. What is the SHC of the metal?

A 2kg metal cylinder is supplied with 1600J of energy to heat it from 5C to 13C. What is the SHC of the metal?