S2 Quiz 6

How many Joules are released (q_rxn) when a reaction in a calorimeter causes 50.0 g of water to increase in temperature by 0.0400 ^◦C? (Express as a positive absolute value).

What is the temperature change (∆T), expressed in ^◦C, when 8.00 g of water (c_s = 4.184 J/g· ◦ C) absorbs 250 J of heat?

What is the Enthalpy Heat of Reaction (∆H_rxn), expressed in kJ/mol, if 0.500 moles of reactant releases 4.15 kJ of heat? (Express as absolute value).

How many moles (n) are present in a sample that requires 32.0 kJ of heat to vaporize if the ∆H_vap is 4.50 kJ/mol?

How many Joules are required to raise the temperature of 0.500 g of water (c_s = 4.18 J/g · ^◦C) by 2.00 ^◦C?

How many Joules are required to melt 1.50 moles of a substance if the ∆H_fus is 4.25 kJ/mol? (Express your answer in kJ).

How many Joules are required to heat 2.50 g of a substance (c_s = 0.200 J/g · ^◦C) by a temperature of 15.0 ^◦C?

What is the mass (m), expressed in grams, of a metal (c_s = 0.900 J/g · ^◦C) that absorbs 40.5 J to raise its temperature by 5.00 ^◦C?

What is the specific heat, expressed in J/g · ^◦C, of an 8.20 g object that requires 125 J to change temperature by 10.0 ^◦C?

What is the specific heat, expressed in J/g · ^◦C, of a 10.0 g sample that absorbs 45.0 J of heat to raise its temperature by 1.25 ^◦C?