1) vocab word--the quantity of heat needed to raise the temperature of 1 g of water 1°C 2) vocab word--the amount of energy required to raise the temperature of 1 g of a substance 1°C 1)calorie 2)specific heat capacity

1) vocab word--the amount of energy required to raise the temperature of 1 mol of a substance 1°C 2) vocab word--the study of heat changes that accompany chemical reactions 1)molar heat capacity 2)thermochemistry

1) vocab word--a food calorie 2) vocab word--the SI unit of heat 3) vocab word--chemical reactions that include a heat term 1)Calorie 2)Joule 3)thermochemical equation

1) vocab word--a device used to measure the amount of heat absorbed or released during chemical or physical process 2) vocab word--the accurate and precise measurement of heat change for chemical and physical processes 1)calorimeter 2)calorimetry

1) vocab word--measurement of heat when using constant- pressure calorimetry 2) vocab word--form of energy that always flows from a warmer object to a cooler object 1)enthalpy 2)heat

1) vocab word—process that absorbs or gains heat from the surroundings 2) vocab word—the ability or capacity to do work 1)endothermic 2)energy

1) vocab word– the heat change caused by the dissolution of one mole of a substance 2) vocab word—the change in enthalpy that accompanies the formation of 1 mole of a compound from its elements 1)Molar heat of solution 2)Standard heat of formation

1) vocab word—the heat absorbed by 1 mole of a substance in melting from a solid to a liquid 2) vocab word—the amount of heat necessary to vaporize 1 mole of a given liquid 1)Molar heat of fusion 2)Molar heat of vaporization

1) vocab word—process that releases or loses heat to the surroundings 2) vocab word—states that if you add two or more thermochemical equations to give a final equation, then you can add the heats of reaction to give the final heat of reaction 1)exothermic 2)Hess’s Law

Endothermic or Exothermic? exothermic

endothermic

exothermic

endothermic

endothermic

exothermic

exothermic

endothermic

Endothermic or Exothermic endothermic

Endothermic or Exothermic? exothermic

4 NO(g) + 6 H 2 O(l) → 4 NH 3 (g) + 5 O 2 (g) ΔH = kJ endothermic NH 3 (g) + HCl(g) → NH 4 Cl(s) ΔH = −176 kJ exothermic

Endothermic or Exothermic? H 2 (g) + ½ O 2 (g) → H 2 O(g) kJexothermic HgO (s) kJ → Hg (l) + ½ O 2 (g)endothermic

A certain mass of water was heated with 41,840 Joules, raising its temperature from 22.0 °C to 28.5 °C. Find the mass of water. The specific heat of water is J/(g·C°).

If it takes joules to heat a piece of gold weighing g from 10.0 °C to 27.0 °C, what is the specific heat of the gold?

Given that the specific heat capacity of gold is J/(g·C°), find its molar heat capacity.

The temperature of 110 mL of water rises from 25.0°C to 26.2°C when 0.10 mol of H + is reacted with 0.10 mol of OH -. Calculate the amount of heat released. Assume that the denisty of the solution is 1.00 g/mL. The specific heat of water is J/(g·C°).

How much heat energy is obtained when 1 kg of ethane gas, C 2 H 6, is burned in oxygen according to the equation: 2C 2 H 6 (g) + 7O 2 (g) → 4CO 2 (g) + 6H 2 O(l); ΔH = –3120 kJ

Determine the energy required to boil grams of water at °C. The ∆H vapor of H 2 O is kJ/mol.

What is the value for ΔH for the following reaction? CS 2 (l) + 3 O 2 (g) → CO 2 (g) + 2 SO 2 (g) Given: C(s) + O 2 (g) → CO 2 (g); ΔH = kJ S(s) + O 2 (g) → SO 2 (g); ΔH = kJ C(s) + 2 S(s) → CS 2 (l); ΔH = 87.9 kJ Hess’s Law, double 2 nd rxn, reverse 3 rd rxn  H = kJ

CH 4 (g) + 2O 2 (g) → CO 2 (g) + 2H 2 O(l) ∆H° = –889.1 kJ ∆H f ° H 2 O(l) = –285.8 kJ/mol ∆H f ° CO 2 (g) = –393.3 kJ/mol What is the standard heat of formation of methane, ∆H f ° of CH 4 (g), as calculated from the data above? −889.1 = [− (−285.8)] −[x + 2(0)] x = ∆H f ° of CH 4 (g) = −75.8 kJ/mol