Answer:
An exothermic reaction is going to produce energy.
Explanation:
rAn exothermic reaction is going to release energy meaning that your ending product will be negative. However if it is an endothermic reaction, it is going to absorb energy/requires energy, and will have an ending product that is positive.
The given statement about standard heat of formation is true.
Explanation:
Yes, it is true that standard heat of formation is same as standard enthalpy of formation. As enthalpy is termed for change in the heat energy occurred in the process of completion of any chemical reaction, the standard enthalpy or heat of formation is termed as the heat energy required to form 1 mole of any substance in its standard state from its original, parent or constituent elements in their standard state. Basically, it defines the amount of energy required by the system or compound for its formation from different elements under different synthesis conditions but the nature of the parent samples and temperature and pressure should be kept standard.
So the given statement is true.
It'd be a physical change. This is because it's a change in the state of matter and not altering the chemical structure of water
Answer:
Scale is the right answer
Explanation:
The scale is a sentence that relates distance on the map to distance on Earth
A is the answer im pretty sure