在压力为2MPa条件下，氦氙气体的粘度随温度的升高而增大。气体的粘度是指气体内部分子之间以及与壁面之间摩擦和碰撞引起的抵抗流动的性质。它受到压力、温度等因素的影响。对于理想气体，根据动力学理论，粘度与温度的关系通常表现为随温度的升高而增加，因为温度升高导致分子速度增加，从而增加了分子间的碰撞和摩擦。

The viscosity of helium-xenon gas increases with temperature at a pressure of 2 MPa. The viscosity of a gas is the nature of the resistance to flow caused by friction and collision between molecules within the gas and with the walls. It is affected by factors such as pressure and temperature. For ideal gases, according to kinetic theory, the relationship between viscosity and temperature is usually characterized by an increase with temperature, since higher temperatures lead to an increase in molecular velocities, which in turn increases intermolecular collisions and friction.