更改

:::If the system has rigid walls that are impermeable to matter, and consequently energy cannot be transferred as work into or out from the system, and no external long-range force field affects it that could change its internal energy, then the internal energy can only be changed by the transfer of energy as heat:

::If the system has rigid walls that are impermeable to matter, and consequently energy cannot be transferred as work into or out from the system, and no external long-range force field affects it that could change its internal energy, then the internal energy can only be changed by the transfer of energy as heat:

:::If the system has rigid walls that are impermeable to matter, and consequently energy cannot be transferred as work into or out from the system, and no external long-range force field affects it that could change its internal energy, then the internal energy can only be changed by the transfer of energy as heat:

::If the system has rigid walls that are impermeable to matter, and consequently energy cannot be transferred as work into or out from the system, and no external long-range force field affects it that could change its internal energy, then the internal energy can only be changed by the transfer of energy as heat:

:::如果系统具有不渗透物质的刚性壁，那么能量不能通过做功传入或传出系统，而且没有外部的远程力场影响系统以改变其内能，那么内能只能通过以热的形式进行传递来改变:

:::如果系统具有不渗透物质的刚性壁，那么能量不能通过做功传入或传出系统，而且没有外部的远程力场影响系统以改变其内能，那么内能只能通过以热的形式进行传递来改变:

:::<math>\Delta U_{\rm system}=Q</math>

::<math>\Delta U_{\rm system}=Q</math>

:::<math>\Delta U_{\rm system}=Q</math>

::<math>\Delta U_{\rm system}=Q</math>

where {{math|''Q''}} denotes the amount of energy transferred into the system as heat.

::where {{math|''Q''}} denotes the amount of energy transferred into the system as heat.

where {{math|''Q''}} denotes the amount of energy transferred into the system as heat.

::where {{math|''Q''}} denotes the amount of energy transferred into the system as heat.

其中{{math|''Q''}}表示以热量形式传递到系统中的能量。

::其中{{math|''Q''}}表示以热量形式传递到系统中的能量。