Question

Для изменения температуры нафталина, никеля, латуни массой 1 кг на 1оС требуется 130, 460, 400 Дж энергии. Чему равна удельная теплоёмкость этих веществ? Нафталин С =________________________ Латунь С = ________________________ Никель С = ________________________

Answer 1

Нафталин С = 130 дж/кг*оС

Латунь С = 400 дж/кг*оС

Никель С = 460 дж/кг*оС

Answer 2

Calculation of Specific Heat Capacities

To calculate the specific heat capacities of naphthalene, nickel, and brass, we can use the formula:

Q = mcΔT

Where: - Q is the amount of energy required (in Joules) - m is the mass of the substance (in kilograms) - c is the specific heat capacity of the substance (in J/kg·°C) - ΔT is the change in temperature (in °C)

Let's calculate the specific heat capacities for each substance.

Naphthalene (C)

Given: - Mass (m) = 1 kg - Energy required (Q) = 130 J - Change in temperature (ΔT) = 1 °C

Using the formula Q = mcΔT, we can rearrange it to solve for c:

c = Q / (mΔT)

Substituting the given values:

c = 130 J / (1 kg * 1 °C) = 130 J/kg·°C

Therefore, the specific heat capacity of naphthalene is 130 J/kg·°C.

Brass (C)

Given: - Mass (m) = 1 kg - Energy required (Q) = 400 J - Change in temperature (ΔT) = 1 °C

Using the formula Q = mcΔT, we can rearrange it to solve for c:

c = Q / (mΔT)

Substituting the given values:

c = 400 J / (1 kg * 1 °C) = 400 J/kg·°C

Therefore, the specific heat capacity of brass is 400 J/kg·°C.

Nickel (C)

Given: - Mass (m) = 1 kg - Energy required (Q) = 460 J - Change in temperature (ΔT) = 1 °C

Using the formula Q = mcΔT, we can rearrange it to solve for c:

c = Q / (mΔT)

Substituting the given values:

c = 460 J / (1 kg * 1 °C) = 460 J/kg·°C

Therefore, the specific heat capacity of nickel is 460 J/kg·°C.

To summarize: - Naphthalene (C) = 130 J/kg·°C - Brass (C) = 400 J/kg·°C - Nickel (C) = 460 J/kg·°C

Please let me know if there is anything else I can help you with!