calorie s pecific heat capacity

vocab word--the quantity of heat needed to raise the temperature of 1 g of water 1°C2) vocab word--the amount of energy required to raise the temperature of 1 g of a substance 1°C • calorie • specific heat capacity

vocab word--the amount of energy required to raise the temperature of 1 mol of a substance 1°C2) vocab word--the study of heat changes that accompany chemical reactions • molar heat capacity • thermochemistry

vocab word--a food calorie2) vocab word--the SI unit of heat3) vocab word--chemical reactions that include a heat term • Calorie • Joule • thermochemical equation

vocab word--a device used to measure the amount of heat absorbed or released during chemical or physical process2) vocab word--the accurate and precise measurement of heat change for chemical and physical processes • calorimeter • calorimetry

vocab word--measurement of heat when using constant-pressure calorimetry2) vocab word--form of energy that always flows from a warmer object to a cooler object • enthalpy • heat

vocab word—process that absorbs or gains heat from the surroundings2) vocab word—the ability or capacity to do work • endothermic • energy

vocab word– the heat change caused by the dissolution of one mole of a substance2) vocab word—the change in enthalpy that accompanies the formation of 1 mole of a compound from its elements • Molar heat of solution • Standard heat of formation

vocab word—the heat absorbed by 1 mole of a substance in melting from a solid to a liquid2) vocab word—the amount of heat necessary to vaporize 1 mole of a given liquid • Molar heat of fusion • Molar heat of vaporization

vocab word—process that releases or loses heat to the surroundings2) 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 • exothermic • Hess’s Law

Endothermic or Exothermic? exothermic

Endothermic or Exothermic? endothermic

Endothermic or Exothermic endothermic

Endothermic or Exothermic? 4 NO(g) + 6 H2O(l) → 4 NH3(g) + 5 O2(g) ΔH = +1170 kJ endothermic NH3(g) + HCl(g) → NH4Cl(s) ΔH = −176 kJ exothermic

Endothermic or Exothermic? H2(g) + ½ O2(g) → H2O(g) + 286 kJ exothermic HgO (s) + 90.7 kJ → Hg (l) + ½ O2 (g) endothermic

A certain mass of water was heated with 41,840 Joules, raising its temperature from 22.0 °Cto 28.5 °C. Find the mass of water. The specific heat of water is 4.184 J/(g·C°). 41840 J = m x 6.5C x 4.184 J/g C m = 1538 g

If it takes 41.72 joules to heat a piece of gold weighing 18.69 g from 10.0 °C to 27.0 °C, what isthe specific heat of the gold? 41.72 J = 18.69 g x 17C x C C = 0.131 J/(g·C°)

Given that the specific heat capacity of gold is 0.131 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 4.184 J/(g·C°).

How much heat energy is obtained when 1 kg of ethane gas, C2H6, is burned in oxygen according to the equation:2C2H6(g) + 7O2(g) → 4CO2(g) + 6H2O(l); ΔH = –3120 kJ

Determine the energy required to boil 43.89 grams of water at 100.0 °C. The ∆Hvapor of H2O is 40.67 kJ/mol.

What is the value for ΔH for the following reaction?CS2(l) + 3 O2(g) → CO2(g) + 2 SO2(g) Given:C(s) + O2(g) → CO2(g); ΔH= -393.5 kJS(s) + O2(g) → SO2(g); ΔH= -296.8 kJC(s) + 2 S(s) → CS2(l); ΔH= 87.9 kJ Hess’s Law, double 2ndrxn, reverse 3rdrxn H = -1075 kJ

CH4(g) + 2O2(g) → CO2(g) + 2H2O(l)∆H° = –889.1 kJ∆Hf° H2O(l) = –285.8 kJ/mol∆Hf° CO2(g) = –393.3 kJ/molWhat is the standard heat of formation of methane, ∆Hf° of CH4(g), as calculated from the data above? −889.1 = [−393.3 + 2(−285.8)]−[x + 2(0)] x = ∆Hf° of CH4(g) = −75.8 kJ/mol

calorie s pecific heat capacity