Some thermodynamic properties of ethanol are listed in the table. Thermodynamic
Properties
Property
Value
c(solid) 0.5 J/g °C
c(liquid) 1.03/9 °C
c(gas) 2.0 3/9 °C
Melting Point -114 °C
Boiling Point 78 °C
How much heat is released when 40.0 g of ethanol cools from - 120 °C to - 136 °C? (4 points)
640
580
3203
2903

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.