Engineering Thermodynamics
The general gas energy equation is (where Q1 - 2 = Heat supplied, dU = Change in internal energy, and W1 - 2 = Work done in heat units)

Q1 - 2 = dU + W1 - 2
Q1 - 2 = dU × W1 - 2
Q1 - 2 = dU/W1 - 2
Q1 - 2 = dU - W1 - 2

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Engineering Thermodynamics
First law of thermodynamics

Enables to determine change in internal energy of the system
Provides relationship between heat, work and internal energy
All of these
Does not enable to determine change in entropy

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