心智圖資源庫 物理物態變化
物理中的物態變化是指物質從一種狀態變化到另一種狀態的過程。主要介紹了物理學中的幾種基本物態變化,適用於物理啟蒙。
編輯於2024-11-01 20:18:10This is a mind map about the annual work plan of the three pillars of human resources. The main contents include: strategic human resources planning, talent recruitment and allocation, employee performance management, employee training and development, employee relationships and communication, employee welfare and care, human resources information system construction, regulatory compliance and risk management, and organizational culture construction.
This is a mind map for the diagnosis and treatment of acute cerebral hemorrhage in patients with hemodialysis. The annual incidence of acute cerebral hemorrhage in patients with hemodialysis is (3.0~10.3)/1000, and the main cause is hypertension. Compared with non-dialysis patients, the most common bleeding site is the basal ganglia area, accounting for 50% to 80%; but the bleeding volume is large and the prognosis is poor, and the mortality rate is 27% to 83%. Especially for patients with hematoma >50ml, hematoma enlarged or ventricular hemorrhage on the second day after onset, the prognosis is very poor.
The logic is clear and the content is rich, covering many aspects of the information technology field. Provides a clear framework and guidance for learning and improving information technology capabilities.
This is a mind map about the annual work plan of the three pillars of human resources. The main contents include: strategic human resources planning, talent recruitment and allocation, employee performance management, employee training and development, employee relationships and communication, employee welfare and care, human resources information system construction, regulatory compliance and risk management, and organizational culture construction.
This is a mind map for the diagnosis and treatment of acute cerebral hemorrhage in patients with hemodialysis. The annual incidence of acute cerebral hemorrhage in patients with hemodialysis is (3.0~10.3)/1000, and the main cause is hypertension. Compared with non-dialysis patients, the most common bleeding site is the basal ganglia area, accounting for 50% to 80%; but the bleeding volume is large and the prognosis is poor, and the mortality rate is 27% to 83%. Especially for patients with hematoma >50ml, hematoma enlarged or ventricular hemorrhage on the second day after onset, the prognosis is very poor.
The logic is clear and the content is rich, covering many aspects of the information technology field. Provides a clear framework and guidance for learning and improving information technology capabilities.
物理物態變化
溫度
概念
物理學中通常用溫度來表示物體的冷熱程度
溫度計
液體溫度計是根據物體的冷熱程度來製作的
標準大氣壓力下冰水混合物的溫度為攝氏0度,沸水的溫度為攝氏100度
體溫計的量程是攝氏35度到42度
溫度計的使用
指針是寒暑表的原理,是固體的熱脹冷縮
一看清測量範圍,二看清溫度計的分度值
一玻璃泡全部進入被測液體中,不要碰到容器底或容器壁。二待溫度計的示數穩定後再讀數。三視線要與溫度計中的液面相平
融化
概念
由固體變成液體的過程
實驗(研究海波和石蠟的熔化變化規律)
實驗裝置由下而上,水浴加熱的原因是方便觀察海波和石蠟的融化過程
海波在融化中溫度保持不變,即海波是晶體
石蠟是非晶體
子主題
熔點
晶體熔化時的溫度稱為熔點,而非晶體沒有固定的熔化溫度
熔化吸熱
凝固
概念
由液態變成固態的過程
凝固點
同一物質的凝固點和它的熔點相同
液體凝固形成晶體時的固定溫度,稱為凝固點
凝固放熱
汽化
氣化現象吸熱
概念
物質從液態變成氣態的過程
沸騰:沸騰是液體內部和表面同時發生的劇烈氣化現象
實驗:水在沸騰後,溫度不持續升高
蒸發:在任何溫度下都能發生的氣態變化,蒸發只發生在物體表面
加速蒸發的方法:一升高物體的溫度;二:增加液體的表面積;三:加速液體表面上空氣的流動
蒸發與沸騰的相同點:都是氣化現象, ;不同點:蒸發是在物體表面,而沸騰是在內部和表面;沸騰需要達到沸點,而蒸發在任何溫度下都能發生
汽化吸熱
液化
概念
物質由氣態變成液態的過程
白氣是呼出的水蒸氣遇到冷空氣凝結成的小水珠;例如露珠,白霧
液化方法:一降低溫度;二壓縮體積
液化放熱
昇華和凝華
物質從固態直接變成液態的過程叫做昇華;物質從氣態直接變成固態的過程叫做凝華
霜,雪,冰花,霧凇等都是凝華現象,樟腦片;冬天結冰的衣服慢慢變乾,是昇華現象
冰花是在窗內
昇華吸熱,凝華放熱