Answer to the Question
C. Barium phosphate
Answer:
75 g of water
Explanation:
Thermal energy refers to <em>an object's internal energy.</em> This internal energy is brought about by<em> kinetic energy</em> <em>(energy due to motion).</em> If two objects have the same mass, their thermal energy can be drawn upon the presence of varying temperatures. However, in the case above, both water and metal pot have the same mass and temperatures. Thus, we have to compare both of them in terms of "specific heat" (not on the basis of temperature).
Specific heat is <u>a form of thermal energy.</u> It refers to the object's resistance when there is a change in temperature. Water is said to have more specific heat than metals. In fact, is has a "high specific heat." This means that once the water is heated, it takes a longer time for it to cool down compared to metals. This is because<em> its heat loss is in a slower process. </em>
Thus, a 75 g of water has more thermal energy than a 75 g of metal pot.
(Answer) 0.166 moles of copper (I) nitride are needed.
Mass of copper (I) oxide = 35.7 g
Moles of copper (I) oxide formed by the reaction = (Mass / molar mass)
= ( 35.7 g / 143.09 g/mol ) = 0.25 moles
According to the balanced chemical equation,
mole ratio of copper (I) nitride and copper (I) oxide = 2: 3
Therefore, moles of copper (I) nitride needed to form 0.25 moles of copper (I) oxide = (2/3 x 0.25) moles = 0.166 moles.
Thus, 0.166 moles of copper (I) nitride are needed to form 0.25 moles of copper (I) oxide.
The change in enthalpy shows on the graph is the red arrow shows that enthalpy is positive, indicating an endothermic reaction.
<h3>What is potential energy?</h3>
Energy is the basic thing to do any reaction or any process. There are many kinds of energy are present that are use indifferent processes.
Potential energy is the energy that is saved to do a work, or the energy that is present before a work occurred.
The graph is attaches below.
Thus, the correct option is A. The red arrow shows that enthalpy is positive, indicating an endothermic reaction.
Learn more about potential energy
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