Answer to Question #309682 in Chemistry for mcc

Question

The first law of thermodynamics hints that __________. 

a. net energy flow to or from any surroundings comes in either heat or work.

b. net heat flow to or from any system comes in either energy or work.

c. net energy flow to or from any system comes from the surroundings.

d. net energy flow to or from any system comes in either heat or work.

Hess’s law states that the __________________. 

a. enthalpy of a sum of a series of reactions is unequal to the sum of the enthalpies of those two reactions.

b. enthalpy of a sum of a series of reactions is equal to the sum of the enthalpies of those two reactions.

c. enthalpy of a sum of a series of reactions is equal to the sum of the heat capacities of those two reactions.

d. enthalpy of a sum of two reactions is equal to the difference of the enthalpies of those two reactions.

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

a. temperature

b. volume

c. energy

d. pressure

Answer 1

a) The first law of thermodynamics hints that net energy flow to or from any system comes in either heat or work.

b. enthalpy of a sum of a series of reactions is equal to the sum of the enthalpies of those two reactions

c. energy