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Semmy [17]
3 years ago
9

A copper rod that has a mass of 200.0 g has an initial temperature of 20.0°C and is heated to 40.0°C. If 1,540 J of heat are nee

ded to heat the rod, what is the specific heat of copper?
Chemistry
1 answer:
almond37 [142]3 years ago
5 0

Answer:

Specific heat of copper = 0.385 J/(gi°C)

Explanation:

Given:

Mass of copper (m) = 200 g =

Initial temperature (T1) = 20°C

Final temperature (T2) = 40°C

Heat needed (Q) = 1,540 J

Find:

Specific heat of copper = ?

Computation:

⇒ Change in temperature (ΔT) = T2 - T1

⇒ Change in temperature (ΔT) = 40°C - 20°C

⇒ Change in temperature (ΔT) = 20°C

⇒ Specific heat of copper = Q / [mΔT]

⇒ Specific heat of copper = 1,540 / [(200)(20)]

Specific heat of copper = 0.385 J/(gi°C)

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Answer:

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Explanation:

Tenemos que balancear, por el método de tanteo, las siguientes ecuaciones químicas.

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N₂O₅ + H₂O ⇒ 2 HNO₃

b. En la segunda reacción, óxido de sodio reacciona con agua para formar hidróxido de sodio. Es una reacción de síntesis o combinación.

Na₂O + H₂O ⇒ NaOH

Podremos obtener la ecuación balanceada si multiplicamos NaOH por 2.

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