Question

Тепловая машина работает по циклу Карно и за счет каждой килокалории, полученной от нагревателя, совершает работу 1,7 кДж. Температура холодильника равна 20 °С. Какова температура нагревателя?

Answer 1

На здоровье )))))))))))))))))

Answer 2

Calculating the Temperature of the Heater in a Carnot Cycle

To calculate the temperature of the heater in a Carnot cycle, we can use the formula for the efficiency of a Carnot engine and the given information about the work done and the temperature of the cold reservoir.

Given: - Work done per kilocalorie = 1.7 kJ - Temperature of the cold reservoir (Tc) = 20 °C

The efficiency of a Carnot engine is given by the formula: Efficiency (η) = 1 - (Tc/Th)

Where: - η is the efficiency of the Carnot engine - Tc is the temperature of the cold reservoir - Th is the temperature of the hot reservoir (in this case, the heater)

We can rearrange the formula to solve for Th: Th = Tc / (1 - η)

The work done per kilocalorie can be converted to joules: 1 kilocalorie = 4184 joules

Calculation:

1. Convert work done per kilocalorie to joules: - 1 kilocalorie = 4184 joules - Work done = 1.7 kJ = 1.7 * 4184 J

2. Calculate the efficiency of the Carnot engine: - Efficiency (η) = Work done / Heat absorbed = 1.7 * 4184 J / (1 kilocalorie)

3. Calculate the temperature of the heater (Th): - Th = Tc / (1 - η)

Let's perform the calculations:

Results:

1. Convert work done per kilocalorie to joules: - Work done = 1.7 kJ = 1.7 * 4184 J = 7118.8 J

2. Calculate the efficiency of the Carnot engine: - Efficiency (η) = 7118.8 J / (1 kilocalorie) = 7118.8

3. Calculate the temperature of the heater (Th): - Th = 20 °C / (1 - 7118.8)

The temperature of the heater in the Carnot cycle can be calculated using the above steps.