Thermodynamic is concerned with

Options

A. Total enegry of a system
B. Enegry chnages in a system
C. Rate of a chemicle change
D. Mass changes in nuclear reactions

Explanation

To answer the question "Thermodynamics is concerned with," we will analyze the options provided and determine which one aligns with the principles of thermodynamics.

### Step-by-Step Solution:

1. **Understanding Thermodynamics**:
- The term "thermodynamics" is derived from two Greek words: "thermo," meaning heat, and "dynamic," meaning change. This indicates that thermodynamics deals with heat and energy changes.

2. **Analyzing the Options**:
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