This was difficult for me. I broke two bolts also...one on each side of the water pump shaft. I had to pry behind the body of the pump to work it off of what remained of the broken bolts. I will start the fix tonight and I don't expect it to be pleasant. This will certainly involve drilling out the old bolts and tapping new threads. Looks like the most correct approach to that involves removing that aluminum spacer the water pump botls to. Unfortunately the oil pan is bolted to the bottom of that....so I will have to mess with the oil seal as well. I would be interested in hearing feedback from anyone else who has dealt with this.
No. Mechanical weathering takes place when rocks are broken down without any change in the chemical nature of the rocks.
A chemical change is when the molecules of an object / solution are changed. A physical change is when the object / solution is altered without molecular change. Breaking glass is a physical change.
Purely physical.
When something is broken the object itself obviously changes, but what it is made of remains the same.
no. melting is a physical change and does not involve breaking of covalent bonds
Due to the breaking or formation of the bonds that hold the particles together.
Malleable?
Breaking something is an example of a physical change.
Breaking a glass jar changes the physical form of the glass without changing its chemical composition.
Enthalpy is the measurement of total energy change of a reaction. The energy of bond formation and bond breaking can be used to calculate the bond enthalpy of the reaction. Bond enthalpy is the enthalphy change when 1 mol of bond is broken. Therefore the general equation to calculate the enthalpy change is energy of bond broken subtract by energy of bond formation.
chemical weathering
This change is a physical change because the matter is made up of the same components that it consisted of before it was broken. An example of a chemical change is the molecular rearrangement of matter like rust on a car.