4. Perform the following heat calculations. You must show all work and include units on answers a. How much heat is required to raise the temperature of 10.0 g of iron from 25°C to 100.°C?
The specific heat capacity of iron is 0.46 J/g°C.

b. The specific heat capacity of water is 4.184 J/g°C. How much heat is required to heat 500.0
g of water from 50.0°C to 100.°C?

c. A 45.4 g sample of lithium is cooled from 250.0°C to 25.0°C. The specific heat capacity of
lithium is 3.56 J/g°C, what amount of heat is released?

d. How many kilojoules of heat are released when 0.72 mole of oxygen gas are used to
combust methane?
CH4 (g) + 2O2 (g) → CO2 (g) + 2H2O (ℓ) + 890kJ

e. How much heat is released when 1.4 mol of hydrogen fluoride are produced?
H2 (g) + F2 (g) → 2HF (g) + 536k

Help me plss! I only have a few hours left!