1.1异丁烷热物理性质表用于计算异丁烷的压力-体积-温度（PVT）、热力学和输运性质，用于工艺设计和操作。提供了温度在135到600 K之间、压力在35 MPa之间的气体和液体异丁烷的表格。这些表格是由国家标准与技术研究所（前身为国家标准局）在四年的努力之后开发的，这些努力的最终目的是获取可用的物理性质数据，进行实验测量，并制定这些表格以用于热计算。

1.1 The isobutane thermophysical property tables are for use in the calculation of the pressure-volume-temperature (PVT), thermodynamic, and transport properties of isobutane for process design and operations. Tables are provided for gaseous and liquid isobutane at temperatures between 135 and 600 K at pressures to 35 MPa. These tables were developed by the National Institute of Standards and Technology (formerly the National Bureau of Standards) upon culmination of four years of effort in acquiring available physical properties data, performing experimental measurements, and in formulating these tables for use in thermal computations.