# P1

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• Created by: gums
• Created on: 27-07-15 22:47

## 1. Which equation is correct?

• energy = mass x specific heat capacity x change in temperature
• energy = mass x specific heat capacity x temperature
• energy = mass x specific latent heat x temperature
1 of 6

• 3.34 kJ
• 33.4 kJ
• 33,400 kJ

## 3. The specific heat capacity of water is 4181 J/kg/°C and that of lead is 128 J/kg/°C. This means:

• More energy is needed to heat water than is needed to heat the same mass of lead by the same amount
• More energy is needed to boil water than is needed to boil lead
• Lead melts at a low temperature

## 4. As a solid melts:

• its temperature stays the same
• its temperature decreases
• its temperature increases

## 5. The specific latent heat of melting for lead is 22.4 kJ/kg and that of oxygen is 13.9 kJ/kg. This means:

• more energy is needed to melt lead than is needed to melt oxygen
• more energy is needed to heat lead than is needed to heat the same mass of oxygen by the same amount
• lead melts at a high temperature