THERMO-RECAP

The first law of thermodynamics states that energy is

• 
  created

• destroyed

• 
  created and destroyed

• 
  conserved

The first law of thermodynamics states that the change in the internal energy of a system is equal to the difference in energy transferred to or from the system as heat and

• force

• mass

• work done

• pressure

Define ΔH

• Change in Specific Heat; Heat by one Degree Celsius

• Change in Temperature; the energy we calculate; Degree Celsius

• Change in Enthalpy; the energy/heat we calculate

• Change in Time; time travel

Define Exothermic

• 
  Energy is absorbed; ΔH is negative

• 
  Energy is released; ΔH is positive

• Energy is absorbed; ΔH is positive

• Energy is released; ΔH is negative

Specific Heat is..

• the temperature initial minus temperature final

• the temperature final minus temperature initial

• the amount of heat/energy required to raise 1 gram of a substance by 1°C (or K)

• the item in a system with given weight in grams

A substance with a low specific heat requires less energy to heat up and a substance with high specific heat require more energy to heat up and heats up slower

• True

• False

Is the reaction exothermic or endothermic?

H2 + S + O2 -> H2SO4 ΔH = -811.13kJ

• ΔH is negative so it is endothermic

• ΔH is positive so it is exothermic

• ΔH is negative so it is exothermic

• ΔH is positive so it is endothermic

Choose the correct process for A and B

• A = Isothermal expansion

• B = Adiabatic compression

• A = Isothermal compression

• B = Adiabatic expansion

What are the processes that are shown in this PV graph?

• 
  Isobaric

• Isothermal

• Isochoric

• Adiabatic

Adiabatic process is a process that occurs at constant temperature.

• True

• False