heat value formula

例句：

1. 1.The formula for calculating the heat value of a substance is crucial in determining its energy content.
   计算物质热值的公式在确定其能量含量方面至关重要。
2. 2. In thermodynamics, the heat value formula is used to calculate the change in internal energy due to a change in temperature.
   在热力学中，热值公式用于计算温度变化导致的内能变化。
3. 3. The formula for calculating the specific heat capacity of a material is essential for designing thermal systems.
   计算材料比热容的公式对于设计热系统至关重要。