A carnot engine takes 3 × 106 cal of heat from a reservoir at 627°C, and gives it to a sink at 27°C. The work done by the engine is

Question

A carnot engine takes 3 × 106 cal of heat from a reservoir at 627°C, and gives it to a sink at 27°C. The work done by the engine is (A) 4.2 × 106 J (B) 8.4 × 106 J (C) 16.8 × 106 J (D) zero

Tardigrade Admin · Accepted Answer

Work done by the engine while taking heat Q = 3 × 106 cal is W = 2 × 106 × 4.2 = 8.4 × 106 J.

Q. A carnot engine takes $3 \times 1 0^{6}$ cal of heat from a reservoir at $62 7^{°} C$ , and gives it to a sink at $2 7^{°} C$ . The work done by the engine is

$4.2 \times 1 0^{6} J$

$8.4 \times 1 0^{6} J$

$16.8 \times 1 0^{6} J$

zero

Work done by the engine while taking heat
$Q = 3 \times 1 0^{6}$ cal is $W = 2 \times 1 0^{6} \times 4.2 = 8.4 \times 1 0^{6} J .$

Q. A carnot engine takes 3×106 cal of heat from a reservoir at 627°C, and gives it to a sink at 27°C. The work done by the engine is

4.2×106J

8.4×106J

16.8×106J