Enter the initial thermal energy (J) and the final thermal energy (J) into the calculator to determine the Heat Engine Work.

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## Heat Engine Work Formula

The following formula is used to calculate the Heat Engine Work.

**Whe = Q1 – Q2**

- Where Whe is the Heat Engine Work (J)
- Q1 is the initial thermal energy (J)
- Q2 is the final thermal energy (J)

## How to Calculate Heat Engine Work?

The following two example problems outline how to calculate the Heat Engine Work.

**Example Problem #1:**

- First, determine the initial thermal energy (J). In this example, the initial thermal energy (J) is given as 70.
- Next, determine the final thermal energy (J). For this problem, the final thermal energy (J) is given as 30.
- Finally, calculate the Heat Engine Work using the equation above:

Whe = Q1 – Q2

Inserting the values from above and solving the equation with the imputed values gives:

Whe = 70 – 30 = 40 (J)

**Example Problem #2: **

Using the same process as above, first define the variables required by the formula. In this case, these values are:

initial thermal energy (J) = 90

final thermal energy (J) = 13

Entering these values yields:

Whe = 90 – 13 = 77 (J)