Answer to Question #309664 in Chemistry for mcc

Question

The standard enthalpy of a reaction can be ___________.

a. calculated as the sum between the difference of the standard molar enthalpies of formation of products only.

b. obtained as the difference between the sum of the standard molar enthalpies of formation of products and reactants.

c. calculated as the difference between the sum of the standard molar enthalpies of formation of reactants only.

d. obtained from the different thermochemical equations by applying the first law of thermodynamics.

The heat capacity of a substance is determined ______________.

a. by a constant specific heat values regardless of physical states.

b. through careful measure of specific heat values.

c. through calorimetry.

d. by increasing the temperature by 1°C.

Heat is a form energy transfer between objects as an effect of their difference in _________.

a. volume

b. energy

c. pressure

d. temperature

Answer 1

Solution:

(B) The standard enthalpy of a reaction can be obtained as the difference between the sum of the standard molar enthalpies of formation of products and reactants.

(C) The heat capacity of a substance is determined through calorimetry.

(D) Heat is a form energy transfer between objects as an effect of their difference in temperature