Classmates
Has blue hair!
What is Oli?
How many Kelvin in 0 degrees celsius
273
What does ΔH mean/represent
Enthalpy Change
The units of delta H.
kJ or J/mol?
What does q represent in calorimetry?
Amount of heat gained
Has a big boot on their left foot
What is Justin?
At STP what is the equivalent to moles in 1 liter
24.4
What is Hess’s Law used for?
It is used to calculate the enthalpy change of a reaction
When delta H is negative, is the reaction exothermic or endothermic
Exothermic
Complete this formula: q = mc_
q = mcDt
Red hair and does a lot of chemistry
What is Ms.Cassidy?
What is the molecular geometry of CH4
Tetrahedral
What is enthalpy change?
The amount of heat evolved or absorbed in a reaction at a constant temperature?
Ways to calculate delta H.
Calorimetry, Hess’s Law, Standard Enthalpy of Formation, Bond Enthalpy
What does the specific heat represent?
How much energy is released per grams time temperature.
ragrdoe (anagram)
What is Gerado?
What does PV=nRT stand for
P=Pressure V=Volume n=amount of substance R=Ideal Gas Constant T=Temperature
What does Hess’s Law state?
The enthalpy change of an overall process is equal to to the sum of the enthalpy change of it’s individual step
After heating a marshmallow you find a q of 100kJ. It weighs 400 grams and has a molar mass of 200 g / mol. What is the delta H ?
50 kJ/mol
A marshmallow that weighs 300 grams before cooking has a temperature change of 120 celsius. (Marshmallows have a specific heat of 2 kg/kJ). Find q.
72 kJ
An ageing Chinese mother, feeling alone when her child moves out, gets a second chance at motherhood when one of her dumplings comes to life. (Disney short film)
What is the Hybridization of carbon in acetone
What is the formula for Hess’s Law
Net change in enthalpy = sum change in enthalpy reactions
Methane has a delta H of -890 kJ/mol. If 125 grams of methane are burned according to the equation of CH4 + 3O2 -> CO2 + 2H2O how much heat is released.
6920 kJ/mol
2 mol water has a heat change of 5 C. Assuming 4.18 J/°C g is the specific heat of the water, calculate the total heat change of the reaction that heated up the water.
750 J