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3 years ago

2.0 kg of carbon is heated from 25°C to 55°C, and absorbs 42600 joules of heat in the process.

Chemistry

2 answers:

Marrrta [24]3 years ago

6 0

Answer: c = 710 J/kg°C or 0.71 J/g°C

Explanation: Heat is expressed in the formula Q = mc∆T. Derive to find the specific heat c. So the formula will become c = Q / m∆T

c = Q / m∆T

= 42600 J / 2 kg ( 55°C - 25°C )

= 710 J /kg°C

Or can be expressed by converting kg to g.

c = 0.71 J /g°C

trapecia [35]3 years ago

6 0

Answer:

The heat capacity of carbon is 710 J/kg°C

Explanation:

Given;

Mass (m) = 2.0 Kg

T₁ = 25°C , T₂ = 55°C ∴ Θ = T₂ - T₁ = 55°C - 25°C ==> 30°C

Energy absorbed (E) = 42,600 J

Heat Capacity (C) = ?

heat equation => E = m*C*Θ

Making "c" the subject, the equation becomes

C = E / mΘ

C = $\frac{42,600}{2 (30)}$

C = 710 J /kg°C

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2 years ago

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Answer: Equilibrium constant for this reaction is $2.8 \times 10^{15}$ .

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Chemical reaction equation for the formation of nickel cyanide complex is as follows.

$Ni(OH)_{2}(s) + 4CN^{-}(aq) \rightleftharpoons [Ni(CN)_{4}^{2-}](aq) + 2OH^{-}(aq)$

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Hence, we will calculate the value of K as follows.

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2 years ago

Why can't the reaction, ZnCl2 + H2 → Zn + 2HCI, occur naturally?

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3 years ago

In the Haber reaction, patented by German chemist Fritz Haber in 1908, dinitrogen gas combines with dihydrogen gas to produce ga

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Answer:

The rate at which ammonia is being produced is 0.41 kg/sec.

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