How many joules of energy are required to raise thetemperature
of 100 g of gold from 20.0 degrees celcius to 100degree
celcius?

Q=1040 KJ

Explanation:

Given that

mass ,m = 100 g

We know that 1 kg = 1000 g

100 g = 0.1 kg

m = 0.1 kg

T₁=20°C

T₂=100⁰C

Specific capacity for the gold

Cp=130 KJ/kgK

The energy required to raise temperature from T₁ to T₂

Q= m Cp (T₂ -T₁)

Now by putting the values

Q= m Cp (T₂ -T₁)

Q= 0.1 x 130 (100 -20) KJ

Q=1040 KJ

Therefore the energy required is 1040 KJ.

d. air pressure decreases as altitude increases.