Question

Яка кількість теплоти потрібна щоб росплавити 5 кг золота взятого за температури 65°С

Answer 1

Какое количество теплоты нужно, чтобы расплавить 5 кг золота, взятого при температуре 65°С.

Q1= mc(t2-t1)= 5× 129×(1064-65)= 644355 Дж

Q2 = lm= 0,67×10^5×5= 335000 Дж

Q=Q1+Q2= 644 355 +335000= 979 355 Дж

Answer 2

Calculating the Heat Required to Melt 5 kg of Gold at 65°C

To calculate the heat required to melt 5 kg of gold at 65°C, we can use the formula:

Q = m * L

Where: - Q = heat required (in joules) - m = mass of the substance (in kg) - L = specific latent heat of fusion (in J/kg)

Specific Latent Heat of Fusion for Gold

The specific latent heat of fusion for gold is approximately 63,000 J/kg [[1]].

Calculation

Using the given specific latent heat of fusion for gold, we can calculate the heat required to melt 5 kg of gold at 65°C:

Q = 5 kg * 63,000 J/kg

Q = 315,000 J

Therefore, the heat required to melt 5 kg of gold at 65°C is approximately 315,000 joules.