Many space plasmas are in a turbulent state, displaying fluctuations and nonlinear behaviour at a broad range of scales. Some of these plasmas are also seen to be heated, with dissipation of turbulence as a possible explanation. Many aspects of the turbulence and heating, and their interaction with other space plasma phenomena (e.g., shocks, reconnection, and instabilities), however, remain to be fully understood. This session will address these questions through discussion of observational, theoretical, numerical, and laboratory work to understand these processes. These topics address some of the key science questions of the THOR (Turbulence Heating ObserveR) mission, which is currently in study phase: (1) how are turbulent plasmas heated? (2) how is the dissipated energy partitioned? and (3) how does this operate in different turbulence regimes? This session, therefore, will be relevant for the preparation of the THOR mission, as well as other upcoming missions such as Solar Probe Plus and Solar Orbiter.