GuideFoot - Learn Together, Grow Smarter. Logo

In Chemistry / High School | 2014-04-20

The change in heat energy for a reaction is best expressed as a change in:

A. Enthalpy (H)
B. Absolute temperature (T)
C. Specific heat (c)
D. Entropy (S)
E. Kinetic energy (KE)

Asked by Maryellen430

Answer (2)

If the reaction is at constant pressure then it is a. Enthalpy

Answered by joporto | 2024-06-10

The change in heat energy for a reaction is best expressed as a change in Enthalpy (H), which measures the heat content of a system under constant pressure. Positive values indicate endothermic reactions, while negative values indicate exothermic reactions. Therefore, the correct option is A. Enthalpy (H).
;

Answered by Anonymous | 2024-12-24

Related Questions in Chemistry

📝 Answered - An organic chemist measures the temperature [tex]$T$[/tex] of a solution in a reaction flask. Here is the result: [tex]$T=32.394^{\circ} C$[/tex] Convert [tex]$T$[/tex] to SI units. Round your answer to 6 significant figures.

📝 Answered - Fill in the gaps to balance the equation. Use the smallest set of whole numbers to balance the equation and include coefficients of "1" when appropriate. [tex]$\square$ $C _6 H _{12} O _6+$ $\square$ $O _2 \rightarrow$ $\square$ $CO _2+$ $\square$ $H _2 O$[/tex] Complete the table to determine how many atoms of each element are present in the reactants and products. | Element | Reactant | Products | | :------ | :------- | :------- | | C | | | | H | | | | O | | |

📝 Answered - Which of these changes is an example of a chemical change? A. sodium making an explosion when added to water B. solid CO₂ turning into gaseous CO₂ C. water droplets forming outside a glass on a hot day D. evaporation of water from a pan

📝 Answered - Fill in the gaps to balance the equation. Use the smallest set of whole numbers to balance the equation and include coefficients of "1" when appropriate. [tex]$\square$ LiOH + $\square$ ZnCl _2 \rightarrow $\square$ LiCl + $\square$ Zn ( OH )_2[/tex] Complete the table to determine how many atoms of each element are present in the reactants and products. | Element | Reactant | Products | |---|---|---| | Li | $\square$ | $\square$ | | O | $\square$ | $\square$ | | H | $\square$ | $\square$ | | Zn | $\square$ | $\square$ | | Cl | $\square$ | $\square$ |

📝 Answered - Why study chemistry? a) to be better informed about the world b) to be better able to make informed decisions c) to learn a technique for identifying and solving problems d) all of the above