Calculate the Value of ΔE in Joules for a System

question 6

Multiple Choice

Calculate the value of ΔE in joules for a system that loses 115 J of heat and has 150 J of work performed on it by the surroundings.

• A)-115 J
• B)-35 J
• C)+35 J
• D)+265 J
• E)-265 J

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Definitions:

Direct Materials

Raw materials that are directly involved in the manufacturing of a product and can be easily traced to it.

Direct Labour

The wages paid to workers directly involved in the production of goods or services.

Labour Efficiency Variance

The difference between the budgeted or standard labor hours expected for production and the actual labor hours used.

Standard Labour Hours

The number of labor hours predetermined as necessary to complete a job or task under normal conditions.