Question

5. Температурасы 20°С болатын спирттi толыгымен буға айналдыру үшiн канша жылу мөлшері кажет,Сспирт -2500Дж/кг*°С, г-0,9*10° Дж/кг t- 78с

Answer 1

Ответ:

14,6 кДж

Объяснение:

m=100 г=0,1 кг

T₁=20 °С

T₂=78 °С; ΔT=78-20=58 °С

c=2500 Дж/(кг°C)

L=900 Дж/кг

Q   ?   Q=m*(c*ΔT+ L)=0,1*(2500*58+900)=14590 Дж=14,6 кДж

Answer 2

Calculation of the Heat Transfer

To calculate the amount of heat transfer required to raise the temperature of a substance, we can use the formula:

Q = m * c * ΔT

Where: - Q is the heat transfer (in Joules), - m is the mass of the substance (in kilograms), - c is the specific heat capacity of the substance (in Joules per kilogram per degree Celsius), - ΔT is the change in temperature (in degrees Celsius).

In this case, we have the following values: - m (mass of the substance) = unknown - c (specific heat capacity of the substance) = -2500 J/(kg*°C) - ΔT (change in temperature) = 20°C

To find the mass of the substance, we need to rearrange the formula:

m = Q / (c * ΔT)

Substituting the given values, we get:

m = Q / (-2500 J/(kg*°C) * 20°C)

Now, we need to calculate the value of Q (heat transfer). However, we don't have enough information to determine the value of Q. Could you please provide the value of Q?