To convert 50 Btu to kilojoules, we'll follow these steps:
1. Understand the conversion factor:
The conversion factor from Btu (British thermal units) to joules is given as 1055. This means that 1 Btu is equivalent to 1055 joules.
2. Convert Btu to joules:
Multiply the number of Btu by the conversion factor to convert it to joules.
[tex]\[
50 \, \text{Btu} \times 1055 \, \text{joules per Btu} = 52750 \, \text{joules}
\][/tex]
3. Convert joules to kilojoules:
Since 1 kilojoule (kJ) is equal to 1000 joules, we divide the total joules by 1000 to convert it to kilojoules.
[tex]\[
52750 \, \text{joules} \div 1000 = 52.75 \, \text{kJ}
\][/tex]
4. Round to the nearest tenth:
To round 52.75 to the nearest tenth, we look at the hundredth place (which is 5). Since it is 5 or greater, we round up.
[tex]\[
52.75 \approx 52.8 \, \text{kJ}
\][/tex]
So, the answer is:
C. 52.8
