If the solution around a cell is more concentrated than the cell contents, water will move
Answer Details
When the solution around a cell is more concentrated than the cell contents, it has a lower water potential, so water moves out of the cell by osmosis, down the water potential gradient. Osmosis is passive and happens without warming, and movement is a net flow in one direction (outwards here), not equal in both directions, because there is a water potential difference between the cell and its surroundings.