Butter is a food, a mixture of compounds - not a change.
both, because the ingredients are undergoing both physical and chemical changes such as: Butter melting= physical change Egg whites hardening= chemical change both, because the ingredients are undergoing both physical and chemical changes such as: Butter melting= physical change Egg whites hardening= chemical change
Melting butter for popcorn is a physical change because the butter undergoes a change in state from solid to liquid without any chemical composition changes.
Melting in a warm atmosphere is a physical change; but the oxydation in air or the thermal degradation of butter are chemical changes.
Melting of butter is a physical change, a change of phase; but the brown color, at high temperature, is an indication of thermal decomposition - this ia a chemical change (change of composition).
Melting butter in a pan is a physical change. It involves a change in state from solid to liquid without altering the chemical composition of the butter.
As you may know, determining whether a change is chemical or physical can sometimes be a real pain! This particular change is a hard one. If your talking about butter slightly melting on a hot day because it was left out on the counter, THAT is a physical change and is reversible by simply putting the butter into the fridge. However, melting butter on the stove and having it completely turn to liquid and turn a little brown, THAT is a chemical change and is hard to reverse... a chemical change has occurred while the butter was over the heat.
They're both physical changes. Phase changes are always physical changes. Chemical changes only involve chemical reactions - a change in the identity of the substance. That's why phase changes are physical changes. Ice cream remains ice cream when it melts.
Melting butter is a physical change. Although the state of matter changes(solid into liquid), it is still the some substance.
Melting of butter is a physical change.
Melting butter is a physical change because the butter retains its chemical composition while transitioning from a solid to a liquid state.
It is actually a chemical change. The butter, sugar, water and cream are cooked, resulting in a chemical change. Toffee cannot be "uncooked" back into butter and sugar. Physical changes can be undone. Chemical changes, no.
Melting butter is a physical change because it involves a phase change from a solid to a liquid without altering the chemical composition of the butter.