Answer to Question #309660 in Chemistry for mcc

Question

The first law of thermodynamics hints that __________.

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

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 in either heat or work.

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

The amount of heat absorbed or released by a chemical reaction at constant atmospheric pressure .

a. enthalpy of reaction

b. enthalpy of products

c. enthalpy

d. standard molar enthalpy

Thermal decomposition of limestone to form calcium oxide and carbon dioxide is ________.

a. partly exothermic

b. exothermic

c. endothermic

d. both endothermic and exothermic

Answer 1

Solution:

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

(A) The amount of heat absorbed or released by a chemical reaction at constant atmospheric pressure (enthalpy of reaction).

(C) Thermal decomposition of limestone to form calcium oxide and carbon dioxide is an endothermic reaction.