Question

choose the correct ans & don't be cavil here ? thanks all my leveret ppl i will mark as branliest!​

Answer 1

Given :

▪ Upper temperature = (T)_H

▪ Lower temperature = (T)_L

To Find :

▪ Efficiency of carnot's engine.

Concept :

→ The efficiency of carnot engine

• depends upon the temperatures of the source and the sink.
• is independent of the nature of the working substance.
• is the same for all reversible engines working b/w the same two temperatures.
• is directly proportional to the temperature difference.
• is always less than 100%.

Calculation :

☞ Efficiency of a Carnot's engine (an ideal heat engine) is given by,

$\dashrightarrow\bf\:\eta=1-\dfrac{Q_2}{Q_1}=1-\dfrac{T_2}{T_1}\\ \\ \dag\sf\:\red{T_1=T_H}\\ \\ \dag\:\sf\blue{T_2=T_L}\\ \\ \dashrightarrow\sf\:\eta=1-\dfrac{T_L}{T_H}\\ \\ \dashrightarrow\underline{\boxed{\bf{\gray{\eta=\dfrac{T_H-T_L}{T_H}}}}}\:\orange{\bigstar}$

✏ Q_1 = heat extracted from the source

✏ Q_2 = heat released to the sink

✏ T_1 = temperature of the sink

✏ T_2 = temperature of the sink

Answer 2

Answer:

Explanation:

Given :

▪ Upper temperature = (T)_H

▪ Lower temperature = (T)_L

To Find :

▪ Efficiency of carnot's engine.

Concept :

→ The efficiency of carnot engine

depends upon the temperatures of the source and the sink.

is independent of the nature of the working substance.

is the same for all reversible engines working b/w the same two temperatures.

is directly proportional to the temperature difference.

is always less than 100%.

Calculation :

☞ Efficiency of a Carnot's engine (an ideal heat engine) is given by,