In a heat engine, if the input heat is 800 J and the output work is 300 J, what

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Question: In a heat engine, if the input heat is 800 J and the output work is 300 J, what is the efficiency?

Options:

Correct Answer: 0.375

Solution:

Efficiency = Work output / Heat input = 300 J / 800 J = 0.375 or 37.5%.

In a heat engine, if the input heat is 800 J and the output work is 300 J, what is the efficiency?

In a heat engine, if the input heat is 800 J and the output work is 300 J, what is the efficiency?

Step 1: Identify the input heat value, which is given as 800 J.
Step 2: Identify the output work value, which is given as 300 J.
Step 3: Use the efficiency formula: Efficiency = Work output / Heat input.
Step 4: Substitute the values into the formula: Efficiency = 300 J / 800 J.
Step 5: Calculate the division: 300 J divided by 800 J equals 0.375.
Step 6: Convert the decimal to a percentage by multiplying by 100: 0.375 * 100 = 37.5%.
Step 7: State the final result: The efficiency of the heat engine is 37.5%.

Efficiency of Heat Engines – Efficiency is calculated as the ratio of useful work output to the heat input, indicating how effectively a heat engine converts heat into work.